When I first started to blog as a developer, I was paralyzed about what to write as I wanted to make extra sure that my posts were nothing short of life changing. Thus, I didn't do it that much and the posts were incredibly painful to write.

However, one of my cohorts said that he blogged for nobody else but himself- mostly as a point of reference for a later date. I absolutely loved this idea and have ran with it since.

Granted, my blog may look pretty random these days as its sprinkled with things that I'm learning and things I want to use for reference, but I also don't have to look up the esoteric things that you don't do often (such as setting up symlinks).

I wouldn't discount the power of a blog. Even if its not prolific or life changing, it is a good example of what you're working on and learning, which will inevitably come in handy somewhere down the line for you.