Before starting your fundraisers, sit down and work out how much the booster club wants to make and where the money will go---individual accounts or a general fund or both. In this slugglish economy I think we're all going to see a drop in what we can bring in. People are not going to be as willing to buy something from you after they've been at the gas station!! I would suggest not doing alot of little ones--you will have no friends or relatives left that will talk to you

. Pick a few that have good track records and focus on making those as profitabile as possible.
This is what our gym does:
Host compulsory and optional meet(1 meet in the fall and 1 in Feb/March). We cleared a little over 5k from the compulsory meet and 1500 from the optional. These are usually big fundraisers for a booster club IF you host it and not the gym.
Used leo sales--2x/year---sell all leos at $10. Some money from this went to the girl's accounts/some to booster club.
Poinsetta sales---used a local florist.
Pizza Palz--Old Chicago. They do this nationally for 501(c)(3). Sell coupons for $11 good for 6 mos. People can then buy any of their pizzas with the coupon(the most expensive is $22). I forget the breakout on this, but these sell well.
Bingo--the mega fundraiser. We brought in about $160k last year. Boy, this really requires parent committment and coordination.
The gym has done butter braids in the past and they sell well. Only downside is parents have to come pick up their orders the day of delivery and then be able to get them to their customers quickly since they need to be kept frozen.
Stay away from Cherrydale. We did a cookie dough fundraiser with them and they shipped the dough unrefrigerated, then didn't want to reship a new order and it ended up they just refunded our $. I actually had people that wanted the stuff and 2 mos later had to give them their money back.
Hope all this helps.