Gnoosic - Even if you don't know what you are looking for - gnod will find it.
Great F*cking Startup Advice - Strongly worded suggestions for startup founders
Musicroamer - A visual Pandora for discovering new music
Startup Notes - Most actionable advice from each Startup School speaker
TasteDive - TasteDive recommends similar music (musicians, bands), movies, TV shows, books, authors and games, based on what you like.
First Search - The world's best startup advice, curated and searchable.