What could be a great idea?
It doesn't need to be complex or extraordinary.
An idea, that lots of people love it, need it, and would like to share it, is a great idea.
Sometimes, a very simple or basic idea for a professional could be a great idea for regular people.
Here are some ideas that could be great:
For health section:
1. A healthy recipe which is easy, delicious and economic, and doesn't need a lot of time to prepare;

A great idea could be adding humor to your projects; like using puns about paint in marketing or design. It keeps things light, creative, and helps you stand out in any general discussion.