What to blog about?

Well, isn't the time suitable to blog? Having just finished my exams, I should post a couple of posts in this one year old, though still empty, blog. So, what to blog about? I will begin by some how-tos. It happened to me a lot that I wondered how to. Typing a how to question in Google led me many times to a blog. No wonder that there are many how-tos on the web, especially if I started writing some.