StumbleUpon - a personalized browsing tool for discovering new web sites. download it! related: StumbleVideo - your personal video channel
YouTube Video - for the best user-created videos online. related: Video Sift. alternative: Veoh
Metafilter - a directory of obscure and interesting articles and websites. related: Ask Metafilter. alternative: Fazed
Reddit - people vote for articles and websites that they like. alternative: Digg
FFFFOUND - images that people are bookmarking right now. related: delicious - websites that people bookmark online
Flickr - share awesome photographs. related: browse flickr with ease and search flickr bettr
Kongregate - simply the best web games website ever. related: Flash Games 1 and Chess.com
Damn Interesting - a collection of articles about damn interesting ideas and events. view a random post
Story Log - a place for nonfiction stories that are worth reading. related: Brevity: Nonfiction Journal
3 Quarks Daily - an online intellectual experience. related: The Edge World Question Center and What I Learned Today and Arts and Letters Daily
Woot - one amazing deal on electronics every day, starting at 1am EST
Boing Boing - a refreshing weblog about pop culture. related: NOTCOT - a visual directory of interesting web stuff
Slashdot - tech news site known for its quality discussion forums. related: TechCrunch - profiles new internet startups. alternative: Hacker News
Pandora - free, personalized internet radio. I prefer it to iTunes. related: Songza - listen to any song for free
High Quality Games - free high-quality online games. alternative: casual gameplay - flash games reviews
PostSecret - anonymously contributed postcard secrets. shockingly honest. related: unofficial postsecret archive. alternative: Unburdened.net - anonymous confessions
Engadget - technology gadget tips and reviews. alternative: gizmodo - technology gadget tips and reviews.
The Onion - the most satirical fake news site on the internet. unrelated: Cute Overload - cute pictures of small animals
Wikipedia - the best reference in the world. a random ariticle. related: search wikipedia's dictionary fast with ninja words
XKCD - a webcomic of romance, sarcasm, math, and language. Calvin and Hobbes > XKCD > just about everything else
The New Yorker - well-written, insightful, and relevant. related: Malcolm Gladwell: New Yorker Archive - excellently written articles
YouMail - record personalized voicemail greetings for anyone who calls you. related: a review of youmail
One Sentence - true stories, told in one sentence. related: Overheard in New York
Neil Gaiman's Journal - the online journal of an author of mesmerizing science fiction and fantasy
Lifehacker - save time with software and technology, so you can relax more also: Get My FBI File - cool
MetaCritic - compiled reviews of movies, music, tv shows, games, and books. alternative: Rotten Tomatoes
Unspun - countless user-edited lists on the best things in the universe. e.g. best US city to live in, best movies of all time, best original score for a feature film, etc.
Alluc.org - thousands of tv shows and movies offered for free! also: Peekvid + Online Video Guide + TV Links + Movie Forumz + QuickSilverScreen + Side Reel: wiki project
Insomnio - a tumblelog I like to look at from time to time. and josh spear and gems sty
Confessions of a Pioneer Woman - a fun blog full of adventure. another one: kottke
College Humor - great videos, great community. related: Jake and Amir
Quality BitTorrent Websites - comparison of today's ten most used BitTorrent (p2p) websites. related: a guide to BitTorrent & PizzaTorrent - a BitTorrent search engine
Indecision 2008 - high quality videos of Comedy Central's Jon Stewart and Stephen Colbert
Apple Movie Trailers - the latest movie trailers
bee MP3 - find downloadable songs online. related: File Search Engine - find anything online
The Expert Mind - Scientific American
The Deepest Cut - Christine Kenneally
The Mundanity of Excellence - Daniel F. Chambliss
Is There Anything Good About Men? - Roy F. Baumeister
The Itch - Atul Gawande
Unplanned Freefall? Some Survival Tips - David Carkeet
Can't We Talk? - Deborah Tannen
Random Event Generators Predict the Future - Damn Interesting