The Search tab finds any album or track in your library. Type what you remember of an album or track name and look for it there.
When to reach for it
If you know what you want, search. If you don't, flick through the coverflow and let something catch your eye.
Search and queue
Searching is also the quickest way to build a queue. Look up three albums, line them up, and you've planned the afternoon.
Help it help you
Search can only match what your files say. Clean tags and sensible folder names make for better results, and the folder tips apply here too.