13. YOU CAN DELETE FILES IMMEDIATELY, WITHOUT HAVING THEM MOVE TO THE RECYCLE BIN FIRST.

Go to the Start menu, select Run... and type ' gpedit.msc';
Then select User Configuration, Administrative Templates, Windows Components, Windows Explorer and find the Do not move deleted files to the Recycle Bin setting.
Set it. Poking around in gpedit will reveal a great many interface and system options, but take care -- some may stop your computer behaving as you wish. (Professional Edition only).