If you're looking for tips and tricks from somebody who has been blogging professionally for years AND making a nice living from it, Darren Rowse's blog is an excellent starting point: ProBlogger Blog Tips - The Blog
Agree with Darren Rowse! But also, definite praise for our own member of the Irish Bloggers group: Amanda Webb and her website, Spiderworking! She shares a lot of great tips and her podcast his really good too. Very accessible.