FUNCTION KEYS
F1- Typically pressing this brings up the help file for the program you're currently in. To test this, go ahead and left click on a blank area of your desktop, then press F1. The help file should spring to life, offering it's bounty of knowledge!

F2- This F-key is used to rename stuff. Click on a file or folder and strike the F2 key; you'll be able to rename it with ease! This is a good one to know if you're zipping through a bunch of files you're archiving and you have a specific naming convention in mind. Click the file, press F2 and rename it! - wash, rinse, repeat!

F3 – Used to bring up the search function in Windows, but varies for other programs. Great for Internet Explorer and Firefox users who want to find a specific word or phrase on a web page with ease!

F4 – In Internet Explorer the F4 key opens the address bar. Even though I said I wouldn't be mentioning any extra key commands until later, I must mention that pressing ALT + F4 will close any active program. Careful with this one! :)

F5 – Refresh key. Use this key to reload a web page or refresh your desktop. This is a good one for both the Internet (good for Ebay bid battles) and apparent computer freezes which you can read about here.

F6 – Cycles the cursor from field to field in the active program. In MS Word you can use this F-key to go to the next pane or frame.

F7 – This F-key is program-specific. Experiment in different programs to see what it can do, but remember to save your work first!

F8 – This key is used to boot Windows in Safe Mode. Read about Safe Mode here.