What you should think about is a subject. It makes sense when you think about it. Some people talk about tech matters, or news....or like myself I have a
Fishing diary....which is very well read !!
What you dont want to do is have a blog that just talks about your day....unless it is like a personal thing..in which case why not have a paper and pen one.....where you can be brutally honest about people "ooOOOhhhhhh I HATE that Mr so and so"