What Is a Prompt Library?

What Is a Prompt Library?

A prompt library is a collection of prompts you save and reuse. Think of it like a cookbook. Instead of inventing a recipe every time you cook, you use recipes you know work.

Same with prompts. You write a prompt that works. You save it. Next time you need it, you just pull it out, change a few details, and run it again.

Why Build One?

It saves time. A lot of time.

Right now, you might spend 20 minutes writing and refining a prompt. Next week, you forget how you did it. You spend 20 minutes again. Then again. Then again.

With a library, you write the prompt once. Test it. Save it. Then every time after, it takes 2 minutes.

If you write 10 emails a week and save 18 minutes per email, that is 3 hours a week. That is your whole Friday afternoon.

What You Save in Your Library

Do not save just the prompt. Save the full recipe.

What to Save: Four Things

1. The prompt itself - Word for word. Copy and paste it so it is exact.

2. What it is for - One sentence. Example: "Writes a weekly status update for managers."

3. When to use it - A quick note on when this prompt works best. Example: "Use this when you have 10+ bullet points to turn into a summary."

4. Notes on what works - Things you learned. Example: "Adding specific numbers makes the output better. Asking for bold formatting helps readability."

Example Entry

Prompt name: Email complaint reply

What it is for: Writes a professional, empathetic reply to an upset customer

The prompt: "Write a professional email replying to a customer who is upset. The reason they are upset: [reason]. The solution you are offering: [solution]. Make it warm and sincere. Under 150 words. Start with an apology. End with a clear next step."

When to use it: Use this when a customer has a real complaint and you want to fix it fast. Do not use it for marketing or upselling.

What works:

• Adding [reason] and [solution] as placeholders makes the output better
• Specifying "warm and sincere" tone matters more than length
• Asking for a "clear next step" prevents vague endings

Where to Store Your Library

You have three good options.

Option 1: A Google Doc

Pros: Easy to share, searchable, works on phone Cons: Not as organized as a spreadsheet

Format: Create sections for each category (email, report, research, planning). List each prompt under the section.

Option 2: A Spreadsheet

Pros: Easy to sort, filter, and organize Cons: Not as easy to share on the fly

Format: Columns for Prompt Name, Category, Full Prompt, When to Use, Notes.

Option 3: A Notes App

Pros: Fast to access on your phone or computer Cons: Harder to organize if you have many prompts

Format: One file per category or one large file with clear headers.

Pick the one that matches how you work. The best library is the one you will actually use.

How to Name Prompts

Good names make it easy to find what you need.

Naming Rules

1. Be specific - Not "Email prompt". Instead: "Email complaint reply" or "Cold outreach to prospects".

2. Start with the task - "Write", "Create", "Generate", "Plan", "Research". Example: "Write weekly status update".

3. Add the purpose - What is the output for? Example: "Write weekly status update for managers".

4. Add a version if you improve it - "Email complaint reply v1", "Email complaint reply v2". This way you keep the old one in case v2 does not work.

Good Names

• "Write professional email to upset customer"
• "Create project brief for executives"
• "Research industry trends and threats"
• "Plan quarterly goals with team input"
• "Write LinkedIn post about our company win"

Bad Names

• "Prompt 1"
• "Email thing"
• "Quick one"
• "TODO"

Start Now

Pick one prompt from this course that you have already used or will use soon. Write down all four things: the prompt, what it is for, when to use it, and one note on what works. Do it right now. That is the start of your library.