User blog comment:Canopenerdude/What do you mean you don't know this?/@comment-76.18.12.96-20130329014607

Last Hitting:  You only get gold for dealing the killing blow to minions, and killing a wave of enemy minions quickly will push your lane (move the battle between minions closer to the enemy tower.)  This will make it easier for enemies to sneak up behind you. So to avoid pushing your lane too early, but still get gold, wait, and don't attack, until the minions' health is low enough that you can kill them in one blow

CS:  Creep Score - Number of minions you have last hit.

Baron: Baron Nashor

Red:  The Lizard Elder

Blue: The Ancient Golem