Pro Tips to Build Custom GPTs That Actually Work (and Don’t Just Sound Cool)

Deepak Bhardwaj
Apr 25
2 min read

1. 🎯 Start with a Job Description, Not Just a Vibe

Before you write a single instruction, ask:

What should this GPT do, daily?
Who is using it? A marketer? HR? Sales?
What output do I expect—copy? answers? images? code?

🔑 Think of your GPT like a new hire. Clear roles = clear output.

2. 🧾 Get Specific with Instructions (Vague = Meh)

Avoid:

“Write content for our brand.”

Do this instead:

“Write fintech content for working-class credit access products, using a helpful and conversational tone. Avoid jargon, use data-backed claims, and always align with the KarmaLife voice guide.”

🎯 Clarity = quality. The better the prompt, the smarter the bot.

3. 📁 Feed It a Balanced Diet (of Knowledge Files)

Upload:

Brand tone guide
Product FAQs
Previous content samples
Glossaries, decks, press kits

🧠 Context is king. A GPT without files is like a marketer without chai—functionally useless.

4. 🧪 Test with Real-World Tasks, Not Just ‘Hello World’ Prompts

Throw your GPT into the fire:

Ask it to write that dreaded email campaign
Get it to rewrite your LinkedIn bio
Make it brainstorm blog topics with keywords

💥 You’ll find the bugs faster than you can say “beta”.

5. 🔁 Iterate Like a Growth Hacker

After every output, tweak:

Instructions (more tone? less fluff?)
Files (missing updated info?)
Behaviours (need more structure or bullet points?)

🛠 Your GPT isn’t a statue—it’s a startup product. Build, test, tweak, repeat.

6. 🤝 Train It to Talk Like You

Use phrases your brand uses often. Example: “Wage-linked credit,” “financial dignity,” “earning insights.”

📣 Language = identity. If your GPT doesn’t talk like you, it won’t convert for you.

7. 🚨 Set Boundaries (Yes, Even for AI)

Add things like:

“Don’t speculate about financial advice.”
“Avoid controversial topics.”
“Always fact-check stats unless provided.”

🔒 A rogue GPT is funny in a meme, not in your marketing funnel.

8. 🚀 Build for One Use Case First. Then Clone & Scale.

Don’t try to make a GPT that does everything. Start with:

A blog writer
A support bot
An image caption assistant

📦 Modular GPTs are easier to manage, scale, and upgrade.

✅ Bonus: AiSutra’s Cheat Sheet

🛠 GPT Builder: chat.openai.com/gpts
🔐 Keep it private till it's client-ready
💬 Share sample prompts for team onboarding
📈 Monitor what’s working with regular feedback loops

Want us to build your first one? We'll do the heavy lifting while you sip your coffee. ☕ 👉 Get in touch