Foosball.com has some excellent articles on how to play foosball!
General
- Guide for Beginners and Intermediates - What to practice and focus on in order to improve your game
Passing
- Passing Basics
- The Stick Pass - An easy-to-learn pass, good against beginner/intermediate players
- The Brush Pass - The essential pass; effective against intermediate/advanced players
Catching
- How to Catch - Passing and shooting skills are worthless if you can't catch
- Catching Positions
- Loose Ball Skills - Games are won and lost by the ability to control loose balls
Shooting
Defense
- Goalie Tips
- 5 Bar Defense
- Defense Formation
- How to Clear and Protect Against Slop - Ignore 2nd half of article (on shooting)