Spring clamps,
look around the internet but here is a link.
I would get the 50 piece mini, the 20 piece 4-1/2 and the 15 piece 6-1/2 and you will be set for life
http://www.hobbytool.com/index.asp?P...ATS&Category=8 (looking at the solid plastic ones)
Hemostats and needle nose pliers always come in handy.
A good supply of every size allen wrench known to man helps also.