Fifteen Last.fm Power Tweaks

From LifeHacker:
One of the best ways to discover new music online is with Last.fm, a music recommendation community. Last.fm serves you up new tunes based on a marriage of your unique preferences and the rest of the huge Last.fm community. Last.fm is a pretty simple way to listen to tunes, but there are a few quick and dirty ways you can oomph it up a little. Keep reading for fifteen ways to tweak your Last.fm listening experience.