The secret to low-cost academic blogging is to make blogging a natural byproduct of all the things that academics already do.
- Doing an interesting lecture? Put your lecture notes in a blog post.
- Writing a detailed email reply? "Reply to public" with a blog post.
- Answering the same question a second time? Put it in a blog post.
- Writing interesting code? Comment a snippet into a post.
- Doing something geeky at home? Blog about what you learned.