Instant Expert: Create Your AI Newsletter Assistant in 30 Minutes
Create a writing assistant that actually understands you.
If you’ve ever found yourself typing out the same long prompts over and over again just to get consistent results, you’re not alone. It’s frustrating, inefficient, and—let’s be honest—kind of annoying. And even when you do use the same prompt, base ChatGPT can still be unpredictable. One day it structures your newsletter beautifully, the next it changes the layout entirely or pulls from somewhere out in left field.
That’s the beauty of a custom GPT—it eliminates the guesswork. Instead of wrestling with stochastic responses (aka: the randomness that makes AI feel unreliable at times), you create a model that follows your rules, your structure, and your style every time. No more retyping prompts, no more inconsistent outputs—just a streamlined process that works exactly how you want it to.
But what if you could skip the struggle and have an AI-powered assistant that helps you brainstorm, draft, and refine your content effortlessly? Enter the Instant Expert method—where in just 30 minutes, you can create a custom GPT designed to take the heavy lifting out of your newsletter process.
Instant Expert: Create Your AI Newsletter Assistant in 30 Minutes
Writing a newsletter can be a lot of work—coming up with fresh ideas, crafting engaging content, and making sure everything flows just right.
What if you had an AI-powered assistant that knew your writing style, helped you brainstorm, and even drafted sections for you? That’s exactly what a custom GPT for newsletter writing can do.
This week, I’m diving into how to create your own AI writing assistant that streamlines the process and makes hitting "send" a whole lot easier.
Why Your Newsletter Deserves Its Own AI Assistant
Consistently creating engaging newsletters can quickly become overwhelming, especially when you're busy managing your business. A custom GPT tailored specifically to your newsletter can ease this burden significantly.
Rather than trying to adapt a general AI model every time, creating a focused GPT streamlines content generation, ensures consistency, saves time, and lets you focus on your unique message and business goals.
Clearly Define Your GPT's Newsletter-Specific Instructions
Before setting up your GPT, clearly define its purpose, audience, and style. Consider these areas carefully to ensure the AI delivers content exactly aligned with your goals:
Audience Examples: Who is your audience? Entrepreneurs, creators, busy solopreneurs, coaches, digital product creators, niche-specific consultants.
Tone & Voice Examples: How do you sound when you write or speak? Conversational and casual, authoritative and professional, friendly and encouraging, humorous and relatable, educational and supportive.
Content Length & Style: Short, snackable tips (100–200 words), longer deep-dive sections (400–500 words), quick actionable insights, case-study driven, step-by-step tutorials, or storytelling-driven content.
Newsletter Structures: Simple 3-part format (Intro, body with actionable tips, CTA); educational series format (problem, steps, solution); Q&A style newsletter; curated roundup.
Provide Your GPT with Context: Supercharge Your Results
A custom GPT’s effectiveness hinges on clear and specific context. Rather than relying solely on general prompts, feed your GPT detailed instructions about your business, your target audience, typical newsletter structure, and common themes. The more context give it, the more accurately and effectively it will generate high-quality, targeted content.
Include things like:
Your ideal client's biggest pain points and desires.
Your business values, key messaging, and unique selling points.
Previous examples of successful newsletter issues to model tone, style, and formatting.
Industry-specific terms or jargon your readers expect and understand.
Doing this upfront ensures your GPT consistently delivers results aligned with your brand voice and goals, dramatically reducing editing time.
Example Prompts for GPT Setup (Structure, CTAs, Intros, Closings)
Creating effective prompts is essential for a smooth workflow. Start by asking your GPT to structure your newsletter clearly. For example:
Intro Prompt: “Give me an engaging and brief opening paragraph introducing this week's newsletter focused on [topic] for busy entrepreneurs.”
Content Outline Prompt: “List 5 actionable tips for entrepreneurs struggling with [specific challenge], presented in short, practical sections.”
Closing & CTA Prompt: “Provide a friendly, engaging closing statement with a clear call-to-action inviting readers to book a discovery call or download a related resource.”
Easy-to-Follow GPT Setup Process
Setting up your GPT doesn't require advanced tech skills. What it takes is a commitment to gathering up the needed information and examples.
I'll guide you step-by-step with screenshots and clear instructions to ensure you can confidently implement your new AI newsletter assistant in less than 30 minutes. You'll see exactly how to input your instructions, customize your GPT's context, test its outputs, and refine it until you're satisfied.
After you've gathered everything
You have a prompt which has instructions for your audience, your tone and style of your newsletter.
You have a selection of documents that are about your business, your market and may even include examples of your writing and other content.
Go to your profile on ChatGPT.com and click My GPTs.
Click Create a GPT.
You'll see a screen like this. It's a blank canvas for your create your custom GPT with all the material you've just gathered.
Add the Name of your GPT.
add a short description like Newsletter Assistant.
for Instructions, this is where you'll put your prompt.
Conversation starters are short actions you can click like a button. these are optional.
Knowledge: this is where you'll upload your files with examples and additional content.
Capabilities: select what you want your assitant to be able to do. I usually use web search, and DALL-E image generation.
Actions: we're not using any for this GPT.
Once you've completed these, click create.
Now when you go to your GPTs you'll have your newly created on in the list. Click it to begin using it, you're ready to go.
Real-World Example: From Time-Consuming to Effortless
Picture this: You used to spend hours wrestling with your weekly newsletter—brainstorming topics, drafting, revising, and second-guessing if it would resonate with your audience. Now, with a custom GPT, that entire process takes less than an hour and feels effortless.
Before: Endless brainstorming, painstaking revisions, uncertainty about whether the content will hit the mark.
After: A structured workflow, high-quality drafts generated in seconds, a consistent brand voice, and more time to focus on what truly matters—engaging with your readers. It’s ease.
A custom GPT isn’t just about saving time—it’s about creating a writing assistant that actually understands you. Once you’ve got yours set up, you’ll wonder how you ever wrote a newsletter without it! But we’re not stopping here—next week, we’re taking things up a notch and diving into a fun, unexpected way to level up your content: role-playing with AI.
Ever argued with an AI? Played devil’s advocate? Had it poke holes in your ideas before your audience could? Role-playing with AI isn’t just for entertainment - it’s a game-changing way to refine arguments, uncover blind spots, and make your writing sharper and more persuasive. Stay tuned—it’s going to be a wild one!
See you next week!
Lisa