AI Tools Series: Part 1 — How to Use ChatGPT to Build a Passive Income Business in 2025

Dear Navigator,

You don’t need a degree in tech or a big team to earn money online anymore. In 2025, ChatGPT acts like your AI assistant for everything – writing, research, spreadsheets, even design. By combining ChatGPT with free AI tools, you can create digital products and income streams with no coding.

Billionaire Harbour went from reposting content to a thriving business in months by using AI intelligently (newsletter.billionaireharbour.com). When the focus shifted from chasing trends to building systems with AI, the brand jumped to 373K+ followers and reached 29+ millions of accounts — and you can do it too.

1. AI Tools Overview: ChatGPT is More Than a Chatbox:

Here’s what ChatGPT can do today:

• Canvas editor: ChatGPT’s new Canvas interface lets you highlight and edit drafts directly. Get inline suggestions and restore previous versions easily (help.openai.com). Perfect for writing ebooks or reports.

• Web browsing: The ChatGPT Atlas browser (or built-in search) can pull real-time info from the web (openai.com). No more outdated answers — ask for current stats or articles, and it fetches them instantly.

• File uploads & Excel: Upload documents or spreadsheets. ChatGPT’s Advanced Data Analysis (formerly Code Interpreter) can read Excel/CSV files and generate charts (help.openai.com). Upload sales data, and it’ll analyze or graph it for you.

• Connectors: In ChatGPT settings under Connectors/Apps, sign into tools like Gmail, Google Calendar, Notion, or Canva (chat.openai.com). No API required — ChatGPT can then draft emails, summarize calendar events, pull Notion notes, or design with Canva.

• Google AI Studio: For visuals, Google’s AI Studio (with models like Nano Banana) turns your ideas into free images (newsletter.billionaireharbour.com). Combine ChatGPT’s text with Google AI or Canva templates to create stunning ebooks, social posts, and more.

Together, these tools make ChatGPT your 24/7 cofounder — it writes, designs, analyzes, and remembers context from files and emails (chat.openai.com), helping you go from idea to execution in minutes.

2. Quick Setup (No Coding Needed):

1. In ChatGPT (web), go to Settings → Connectors/Connected Apps.

2. Enable Gmail, Google Calendar, Notion, or Canva, then click “Sign in.”

3. Log into your accounts when prompted. ChatGPT will show what it can access (chat.openai.com).

4. Once connected, you can say:

   • “Summarize my last 5 emails.”

   • “Draft a blog post using my notes from Notion.”

That’s it — no APIs, no tech setup.

3. Actionable Walkthrough: Build a Digital Product with ChatGPT

Let’s launch a simple product (like an ebook, prompt pack, or Notion guide).

1. Choose a topic & niche: 

2. Outline with ChatGPT:

3. Write chapters:

4. Create images:

Compile the ebook: 

6. Generate sales copy:

7. Launch & promote: Upload to Gumroad or Shopify, then ask:

ChatGPT handles most of the workload — research, writing, editing, even color palette advice — while you add creativity.

4. Writing Effective Prompts (That Actually Sell):

The difference between results and frustration is how you prompt.

Prompt Structure:

• Goal: What you want (blog, ad, caption, etc.)

• Audience: Who it’s for (age, background).

• Details: Tone, style, and length.

• CTA: What action you want (buy, subscribe).

Template:

Example:

5. Level Up: Combine ChatGPT + Visual AI Tools for Precision Results:

Once you’ve mastered ChatGPT, the next step is using it with other AI tools that amplify its power.

Think of it as your AI stack — ChatGPT becomes your creative brain, and visual AIs like Midjourney, Google Nano Banana, and Veo 3 act as your hands.

Here’s how to use them together:

1. Use ChatGPT as your prompt engineer.

   • Ask ChatGPT: “Write me a Midjourney prompt for an ultra-realistic luxury mansion at sunset, cinematic lighting, 8K quality, modern minimalist architecture.”

   • ChatGPT will give you a clean, optimized prompt that produces accurate results with minimum tweaks.

2. Feed that prompt into your chosen tool.

   • Midjourney → for ultra-realistic visuals.

   • Google Nano Banana → for creative concept images or product models.

   • Veo 3 → for cinematic AI videos.

3. Refine & reuse.

   • Save the most effective prompts.

   • Adjust wording slightly for new scenes, colors, or moods.

   • Over time, you’ll have your own AI-ready prompt library that keeps your visuals on-brand and fast to produce.

If you want to skip the trial-and-error, we’ve already done the heavy lifting for you.
Our Luxury Creator Guide with 60+ Proven Prompts trains your ChatGPT to generate world-class prompts automatically — the same system that helped us grow to 373K followers and reach 29 million+ views.

👉 Check it out here: Luxury Creator Guide with Prompts

Charting the Waters Ahead:

Each of these stories reveals a simple truth — the future belongs to those who build systems that scale and then anchor that wealth into timeless luxury.

We’re standing at the edge of a creative revolution where AI + infrastructure aren’t just tools — they’re the foundation of new empires. The people who master these systems today are the ones building the billion-dollar brands of tomorrow.

In Part 1, you learned how ChatGPT can become your 24/7 partner for creating, writing, and launching your first income-generating product.

But this is only the beginning.

Next week, we’ll dive into Part 2: Image Generation with Midjourney and Google Nano Banana — where you’ll discover how to craft cinematic visuals, design brand-ready content, and bring your imagination to life using AI tools that once required entire creative teams.

Stay tuned, Navigator — the next tide is coming in.

To your continued ascent,
Captain, Billionaire Harbour ⚓️