The "F" shortcut is useful, but has three different states, so press it a couple times to see what's there.
The Tab key is also one to play with!
Lightroom Help has a list of keyboard shortcuts at the end that would be worth perusing -- in fact perusing over and over again!
One nice feature is the support for multiple monitors. With two monitors you can have a full screen display on one and your tools on the other...nice feature!

