Engadget's massive back to school 2011 sweepstakes ends tomorrow... find out how to win!

We really, really love gadgets, but nothing brings us greater joy than to see our readers unbox a new toy, especially when it can help improve your experience at school. So this year we're giving away bags -- 15 of them, in fact -- each filled with 20 amazing prizes. Each winner will score a laptop, tablet, a killer camera, and even a new dual-core cell phone, along with plenty of other awesome items. We'll be choosing one commenter from each of our back to school category pages, and one from our main contest announcement, so if you meet the qualifications listed on each post, simply leave a comment to be eligible to win. You won't be penalized for commenting more than once on each post, but it won't help your chances, either. And since we'll be randomly selecting one commenter from each post, enter at each of the 14 pages linked to here, along with this page to boost your odds. We'll wrap things up at 12PM ET tomorrow, so better get clickin'!

Note: Comments added below will not be eligible, nor will those left on the main back to school page -- if you see a long list of terms and conditions above the comments section, then you've made it to the right place.