Being a beginner and being bamboozled with so many possibilities it is very difficult to work out the advantages of different layouts that achieve the same thing.
For example, there are any number of three column layouts with liquid middle column ... if I can get them all to work so that the page validates and behaves the way I want how I am going to assess which one is best?
What I want, I think, is a checklist of things to watch out for, things never to do etc etc. So that the code is still "clean" but does what you want.
So far my stuff is very, very simple, but I don't want to get caught out in the future.