40 Tips in 40 Minutes was the name of a talk given by David Sparks, Merlin Mann and Brett Terpstra at MacWorld | iWorld 2012. 40tips.com is the follow up website with all the tips they mentioned - currently some of the tips anyways.

One that was new to me of the list there so far is the ability to CMD-OPTION CLICK on a Dock icon to focus on just that app.

Handy.