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;
2. An easy-to-understand guidance of how to prevent and treat a disease;
3. An exercise plan that is easy to execute and most people would like to continue to do it;
4. A simple way to do Yoga, Meditation or other things for better mental health;
5. A life tip about the best ways for making friends, good parenting and relationship.
6. Other helpful and attractive health related ideas;
7. State-of-the-art health topics.
For wealth section:
1. An easy guide for a primary school student to learn a subject (math, language, science, social study, etc.) in a best way;
2. An easy guide for a middle school student to learn a subject (math, language, science, social study, etc.) in a best way;
3. An easy guide for a high school student to learn a subject (math, language, science, social study, etc.) in a best way;
4. An easy guide for a university student to study a major or field of study in a best way;
5. An easy guide for people to learn how to plan for their education;
6. Ideas about how to best save money;
7. Ideas about how to make a budget and follow the budget;
8. Ideas about how to find jobs and better career development, which helps people to improve income;
9. An easy-to-follow financial plan;
10. An easy guide for investment portfolio management;
11. An easy-to-understand and effective investment method to help people make money in the stock market;
12. An easy-to-understand and effective investment method to help people make money in the real estate market;
13. An easy-to-understand guide for a specific industry small or medium-sized business to start and grow;
14. Ideas about how to achieve FI/RE (Financial Independence and Retirement Early);
15. Ideas about happy retirement;
16. Ideas about tax planning;
17. Ideas about estate planning;
18. Other helpful and attractive wealth related ideas;
19. State-of-the-art wealth topics.
For wisdom section:
1. An easy guide for people to learn a lifelong learning subject or topic in a best way;
2. Ideas about how to help people better understand the world;
3. Ideas about useful learning tools and techniques;
4. Ideas about how to improve learning skills (memory, reading, writing, creativity, etc.)
5. Ideas about how to better do things in life, such as home decoration, storage, cleaning, fix a furniture, fix an appliance, home renovation, prevent rats/ants/insects, make or use tools, install home theater, etc.
6. Ideas about how to deal with critical life events, such as pregnancy, new baby, immigration, etc.
7. Ideas about how to live a better life;
8. Ideas about how to solve world problems;
9. Other helpful and attractive wisdom related ideas;
10. State-of-the-art wisdom topics.
For fun section:
1. A list of the best E-games in each genre;
2. Ideas about how to play E-games with lots of fun;
3. A list of the best board games in each genre;
4. Ideas about how to play board games with lots of fun;
5. Ideas about how to enjoy sports with lots of fun;
6. Ideas about how to travel to a city, country, area, or around the world with the best plans;
7. A list of the best fun readings in each genre;
8. Ideas about how to read with lots of fun;
9. A list of the best music in each genre;
10. Ideas about how to enjoy music with lots of fun;
11. A list of the best movie in each genre;
12. Ideas about how to enjoy movie with lots of fun;
13. Ideas about how to play with pets with lots of fun;
14. A list of the best arts and collections in each genre;
15. Ideas about how to enjoy arts and collections with lots of fun;
16. Ideas about how to enjoy life everyday;
17. Ideas about how to improve happiness;
18. Other helpful and attractive fun related ideas.
There could be much more great ideas. Just use your imagination.