One thing I like to do is feed some of my writing samples to ChatGPT, and then take what is written and just quickly rewrite into my own tone and then give that back to ChatGPT so that it can continue to learn better how I say/write things. 

For those with a Plus account, it's also good to build everything into a GPT, so that you can just use it over and over again, and the more samples you create (that you actually like), you can just continue to upload to your GPT so that it remembers them. 

Step 1: Define What “Your Voice” Actually Means

Most people can’t explain their own style without rambling. Don’t be that person. Break it down into clear traits:

• Tone: Formal, conversational, witty, deadpan, etc.
  
  
• Sentence length: Do you fire off short jabs, or do you write like you’re auditioning for Tolstoy?
  
  
• Structure: Do you love headings, lists, and frameworks, or do you prefer one big block of text like an unreadable manifesto?
  
  
• Vocabulary: Plain and simple, or sprinkled with rare words you Googled once and decided to keep?
  
  

Write this down. Yes, actually write it. If you can’t define your style, you can’t expect a bot to copy it.

Step 2: Feed ChatGPT Examples of Your Writing

You don’t need to upload your collected works. A few samples are enough if they reflect the style you want: blog posts, emails, captions, essays, whatever. Paste them into the chat and say:

“Analyze my writing style. Summarize tone, sentence structure, vocabulary, and overall rhythm.”

Then, refine. If ChatGPT says you “write with clarity and brevity” but you know you ramble like a caffeinated philosopher, correct it. The back-and-forth matters.

Step 3: Test and Adjust

Give ChatGPT a small assignment in your niche—like writing a product description, a blog intro, or even a snarky tweet. Compare it to what you’d actually write. Too stiff? Tell it to loosen up. Too bubbly? Tell it to dial back the exclamation points. Rinse and repeat until it feels right.

Once you are happy with the results, ask ChatGPT to give you a short summary of your writing style.

Making It Stick: Custom Instructions

Once you've refined your style guide, save it in ChatGPT's custom instructions:

1. Click your profile icon
2. Select "Customize ChatGPT"
3. Input your style characteristics under "What traits should ChatGPT have?"
4. Enable for all new chats

This ensures consistency across all your interactions without repeatedly explaining your preferences.