Write about things that interest you or that I think will interest other people. That way there's always something to talk about.
Write about something that you're REALLY passionate about.
I also look for ideas from everyday issues that come up. For instance:
Q: What do I want for dinner tonight?
A: Write a recipe hub!
Q: My friend called me to tell me about some sociopaths at her job...
A: Write a hub about how to deal with toxic people!
Q: The Ravens were sore losers last night, when they threw their win in the Patriots' face...
A: Write a hub about how to compete with grace.
People are always dealing with something, so that should always give you some ideas.
And writing should be enjoyable. Do you really enjoy it?