[Snowflakian]

You can toss it in your sig, so every post you make on your various forums is a form of advertisement at the same time.

After that, it's just mostly content and people hotlinking it, at least if you prefer grass roots exposure on the internet. There's probably more that can be done if you're serious about using it to generate revenue, but again all that circles around content.

Generally it's best to blog about things you know inside and out. Easier to field responses if you feel like it, and helps maintain accuracy. It's also a good idea to blog about something you love, otherwise what's the point in doing something you don't?