Another thing I'm not sure people realise exists is the 'tags' I'm sure you've all seen the huge DISPLACEMENT thing at the bottom of the main page? well those are generated by what people search for most and by the contents of the thread. Another big way those are made is by the tags
we input at the bottom of a thread, right below this posr there's a tags line, it says 'blog' and 'developer blog'. if enough threads have those tags at the bottom it will appear on the main page as something we talk about often and people can click those to find threads about blogs.
The great thing about the tags is anyone can add them. If you made the thread you can add up to five and if you're just reading it you can add up to two. I've added round about 70 or 80 tags to threads now, most of them not my own and its paying off, usefull phrases are appearing in that bottom bit rather than the useless ones automatically generated like "(please" or "heeeaaaaaalllllp" (thanks to josh for that one) or "question"
So go and start adding tags to the threads you read, if it suggests a tag to you whilst you type use that rather than making one that is slightly different so we can easily keep track of things.
Oh, and one thing newer users miss is the thanks button

I'd rather you didn't make a post saying "thanks thats great" but just hit the thanks button instead. of course both is good as well
