Feedscrub filters your feeds based on your preferences. Subscribe to all your favorite feeds, then tell Feedscrub which posts you do and don't like. Feedscrub will learn your preferences and begin filtering out posts that don't interest you.
Filters any RSS feed using a scoring system called PostRank. You can then use a variety of tools to sort and parse those items of interest into manageable lots for you to scan and digest at your leisure.