Google Code-in

In the #haiku IRC channel, if you enter "$wisdom", a bot spits out a random Haiku usability tip. Your task is to supply 3 equally useful and a bit hidden wisdoms.

Here are the ones already there: http://sprunge.us/KHAI

Every tip consists of three lines:

1. Category (Application, GUI, Miscellaneous, Preferences, Terminal... etc.)
2. A short one line tip
3. Optional URL to further info (often a topic in the user guide)