I just had the fine privilege of attending Jared Richardson's "Career 2.0" talk at my local java user group. The talk is based on his book (with Matthew Bass).
One of the things he recommended we all do is create a blog account to write about problems we encounter and solve in development. One attendee created one during a break at the meeting - I settled for after I got home. I already have a personal blog, but I wanted to dedicate one to coding.