As a teacher I am, of course, a reflective practitioner. What's that? Well, it's a new fangled thing that teachers now have to do which basically means you do a lesson and then you write an evaluation of that lesson and discuss where it went right and where it went wrong. Then you follow up by stating how you will improve your lesson next time. it is supposed to be a career long thing but I've not seen it much in many more experienced teachers so I guess they just lose the habit or get too busy to bother...
Why is this relevant to blogging? Well, you can see your blog as your reflective journal. Writing can benefit from reflective practise too. You can discuss what went right and what went wrong and endeavour to correct it in later projects. It's a way of organising thoughts and giving you a clearer idea of what direction you want to go in.
I do some of that in my blog, though it is not the only thing I use it for. I have, for example, talked about the word count motivation method I used a couple of years back to get me writing more regularly and my thoughts on my involvement in NaNoWriMo. I might not make it everything a blog is about, however, as that can be a little monotonous for some to read. Though that may depend on how personal some of the things you talk about are - if they have universal appeal (i.e. methods that others may want to try) then you may be on stronger ground.