Creating effective custom GPT instructions involves several key elements:

1. Clear Task Definition

Explicitly state the primary task or role the GPT will perform for users. Be specific about what it is designed to do, such as content creation, analysis, Q&A, etc. Ensure all tasks are broken down into smaller, actionable steps.

Example: Instead of "Create a summary," use "Summarize the main points of the document in 3-4 sentences.”

2. Knowledge Source

Specify the knowledge source(s) the GPT will draw from - whether it's pre-trained data, uploaded documents/PDFs, or accessing APIs/databases. Provide clear instructions on how to utilize these sources. Clarify how to select relevant and high-quality sources.

Example: “Choose sources from reputable websites, peer-reviewed journals, and industry experts.”

3. Persona and Tone

Define a persona for the GPT, including a name, role, target audience, and desired tone/voice. This helps maintain consistency in interactions. Provide examples of different personas and tones.

The "You Are..." Prompt Snippet Generator by Nicole Leffer is excellent for this.

Example: "For a professional tone, use formal language and industry-specific terminology.”

Structured Instructions

Break down the instructions into sections with headings:

  1. Introduction/Overview
  2. Primary Tasks
  3. Knowledge Utilization
  4. Output Guidelines (format, length, prioritization)
  5. Security/Limitations

Use clear language, bullet points, and examples within each section.

Output Formatting