The internet has changed the world, mostly through big sites like Google, Amazon, MySpace and Facebook. But other smaller sites can, if anything, be even more useful, if only you can find the right ones.
Yelp (almost a verb in itself). Yelping google for reviews (e.g. google "yelp good indian food in New York City). Also check out pixlr [dot] com. For my amateur purposes, fulfills all my needs for Photoshop. Anyone have any others?
W00t for linux! And torrentz is good as well. http://www.thepiratebay.org http://www.stumbleupon.com/ I seriously recommend everyone getting that add-on, it's incredible. http://www.mozilla.com/en-US/firefox/ Get rid of IE and move on to Firefox
erowid.org gives all the details, descriptions, dosages, etc. of ALL drugs, be they plants, synthetic, prescribed, vitamins, hallucinogens, u name it
There's always something new left for you to discover on the internet. New sites appear all the time.