Man I just treat my blog like I used to treat my Livejournal: I write about whatever I want to write. Sometimes that's "woo check out this cool YouTube video". Sometimes that's "hey come see me dance". Sometimes it's a dream I had. Sometimes it's musings on comics I like, or on the ones I'm working on.
And every once in a great while I actually try to write up something about how I use the tools I've mastered. Then I get bored and go use them instead and post the cool new thing I've drawn.
I go for a hybrid approach. A personal blog (or nowadays, Twitter) for sharing random Youtube videos, commenting on politics, and other stuff, and then a "professional" blog for writing longer articles on. It's nice knowing potential employers can see writings that are actually relevant to my field, and not "check out this Gangnam Style parody" ;)
And every once in a great while I actually try to write up something about how I use the tools I've mastered. Then I get bored and go use them instead and post the cool new thing I've drawn.