To blog or not to blog

Hey guys. So this is my first blog for this sight. It's also the first blog that I intend on continuing for a while. I've started a lot of blogs and then deleted them because I didn't have time to commit to them. Well I still don't have time. But I'll make time just for this.

I have a few questions for all of you out there. When starting a blog what do you usually talk about? Do you pick a broad topic and stick to it for the rest of your blogging career? Or do you just randomly write about what you've been thinking that day? A little advice would be much appreciated. Thanks. <3