I would suggest creating a 10x10 matrix for example
Gardening (main topic)

1. Tools for gardening
2. Which soil to buy
3. Which seeds to purchase & what to look for on label
4. How to plant the seed & when to water
5. How often you should water your plant etc

This will take a while but it’s a great way to stay organized and you can even make a matrix out of the tags on Steemit if you are creative enough.