
Well, I check KS for new stuff about once a week, and various other sources (friends, pages such as Bleeding Cool or IO9 or the Daily Illuminator, various mailing lists) tell me about the others. I find it a good practice at this point to check KS at least once a week, especially in the Comics, Music, and Games categories, and often Film & Video and Technology. Also, their front page notes what's popular, and KS has their own mailing list to let you know what they like this week.