Instead of limiting themselves to just a day, Newegg.com is have a 72-hour sale with Newegg Green Monday Deals 2012. They have hundreds of items on sale in categories like automotive, car electronics, cell phones, cables, desktop PCs, laptop PCs, computer cases, CPUs, PC memory, flash memory, digital cameras, hard drives, headphones, home theater, jewelry, watches, kitchen appliances, monitors, motherboards, projectors, networking, and more.
Browse the Featured Items in the Green Monday Sale, or check out all their Green Monday Deals. Find cheap discounts on laptop computers from Samsung, Sony VAIO, and HP Pavilion. (Also check out the really cool Lenovo B320 21.5″ all-in-one PC deal.) Other deals I like are the cheap home theater speaker systems from ONKYO and MartinLogan, as well as the video game specials for PS3 and Xbox 360.