Press F5, then press shift repeatedly. Your character looks like he is dancing!
FPS Counter and Lag Meter
Press and hold either key while in game:
F3 Shows Current FPS
F6 Shows Current Lag
A Coal Alternative
Put wood that you have not turned into planks yet into the top slot of the furnace, and normal wood in the bottom slot. This creates charcoal, which is the same as coal.
Infinite Water Supply
An infinite water supply is an incredibly important thing when you are doing, well, basically anything. Follow these steps to create one.
1. Dig out a 2x2 hole 1 block deep in the ground.
2. Obtain two buckets of water.
3. Empty water into the hole.
4. Enjoy your infinite water!
Here is a list of keyboard shortcuts you can use in Minecraft
F5 Toggle view
F1 Removes hotbar and your arm from the screen
F2 Takes a screenshot