Kasperow, great advice from all who replied. but the most important thing to bring to a jam is beer!. You bring a case of 24, everyone will love you and couldn't care less if you play like crap.

Seriously, the best piece of advice I can give you is listen to what the guys are playing, and try to find something you can add to the groove. Don`t overstep anyone by turning up your amp to 11, and when someone is soloing, play a little softer, and try to support what he is playing. And lastly, its not a competition as to who is the best, but a communion of musical ideas.

And don`t forget to have fun.

Itchin`to play,

Izzy