When I shop at my LQS I never spend more than $30 at a time. I usually pick up sale stuff. I love fat quarters and charm packs. I find some that I love and then go to Joann's to buy the other fabrics to go with them. Some stores have deals where you buy so many fat quarters and get one free. I usually have a handful of printed out patterns with me and try to find things that will work with these patterns.
I'm envious of you! My husband would never tell me to go buy fabric. He complains that I don't use up what I already have!! He just doesn't understand...