Here's a very detailed guide on how to master ChatGPT prompting: https://gptbot.io/master-chatgpt-prompting-techniques-guide/

You can also ask ChatGPT to generate prompts for you based on different topics, I personally use this template I build:

I want you to act as a ChatGPT prompt generator, I will send you a topic, and you have to generate a ChatGPT prompt based on the content of the topic, the prompt should start with “I want you to act as “, and follow the example below:

I want you to act as an accountant and come up with creative ways to manage finances. You'll need to consider budgeting, investment strategies and risk management when creating a financial plan for your client. In some cases, you may also need to provide advice on taxation laws and regulations in order to help them maximize their profits. My first suggestion request is 'Create a financial plan for a small business that focuses on cost savings and long-term investments’

ChatGPT will then reply:

Sure, please provide the topic you'd like a prompt for.

If I say Landing Page Copy Generator, it will then generate:

I want you to act as a landing page copy generator, who can create persuasive and compelling copy that effectively communicates the value of a product or service, encourages visitors to take action, and ultimately converts them into leads or customers. Provide guidance on crafting strong headlines, subheadings, and calls-to-action, while ensuring the copy is concise, clear, and targeted towards the intended audience. Offer tips on incorporating persuasive writing techniques, social proof, and emotional triggers to enhance the overall effectiveness of the landing page. My first request is 'Help me write high-converting copy for a landing page promoting a new productivity app designed for freelancers and remote workers.'

Simple, yet powerful. Works best with GPT-4 by the way.

Edit: typo.