Very nice piece at A List Apart on techniques for writing a weblog people will actually read. Focuses on things you should do, rather than things you shouldn’t (why are viable suggestions so much more rare than lists of things to avoid?)
Anything makes a good subject, as long as you take your time and crystallize the details, tying them together and actually telling a story, rather than offering a simple list of facts. Do readers really want to know how miserable you are? Yes. But they’re going to want details, the precise odor of your room, why you haven’t showered in a week, or how exactly somebody broke your heart. At the same time, you don’t want to over–explain yourself. Understatement can be thunderous, or humorous, or heartbreaking. Or all three.