I encourage all bloggers to learn as much as they can about how their blog works. For those of you who are interested here are some of what I think are the best tutorial sites around.
For html coding for many kinds of elements http://tips-for-new-bloggers.blogspot.com/ is a great site
To make your blog three columns check out http://www.threecolumnblogger.com/. This is one of the few tutorials I have found that if followed step by step, does work!