We often feature projects here, especially on the weekend, that require the magic of an Arduino processor. If you've put off a bookmarked project for lack of Arduino knowledge, now's your chance to beef up.
Ladyada.net, the personal site of Limor, the engineer behind electronics company Adafruit Industries, has an awesome and detailed tutorial to take you from picking out your Arduino chip to launching a simple Hello World! test to incorporating buttons, switches, and more. If you've been putting off projects (like making an Arduino powered coffee pot or DIY quiz show buttons) now's a great time to run through her extensive tutorial and get a firm grasp of Arduino mechanics.
Hit up the link below for the multi-part tutorial.