One advantage to using Twitter is having up-to-the-minute tweets sent right to your cell phone.
Type in
twitter.com/blackfriday or type black friday into the search field so you can follow the deals. If tweeting isn't your thing, you can also track black friday deals through
Facebook.
If you have an iPhone, there's a bar code scanner app. This way when you're at the store you can scan the barcode and see if you can get it anywhere else for less money.