Topics to blog about

I am wondering… how do you come up with the topics you blog about? Obviously, for niche blogs it’s easy. What’s in the news will undoubtedly be the one to write about while for personal blogs it would be something that happened to you lately. But what about for general ones?

I’ve blogs where I post stuff about life in general. Another one about random stuff. The latter is the one I’m having a hard time writing stuff in because I don’t want to write just about anything I can think of but something where I can also engage my one or two reader in.

So tell me, how do you do it?