I started out using my neat air driven riveter. It was a cheap tool from Harbor Freight. It was really cool, when it worked, which was pretty rarely. I am not 100% sure why, but I think it had trouble ejecting the little nail thingys that are on the end of the rivet and used to pull it through the hole. I ended up buying a hand operated one at Sears for $10 and it worked much better. Here is a pic of that tool along with a couple of rivets...
I ended up running out of rivets, coming up about 10 short. I went to Harbor Freight to buy some, and the smallest package they had was 500. Fortunately, the box only cost $2.99. So if anybody needs some riveting done, I still have about 490 left. I will use a few later for connecting things like the ignition system and some other aluminum panels, so I figure it was a good investment. I also broke a couple of 1/8" drill bits. Gotta get a replacement sometime. Sears sells em individually; most places have them packaged in sets and I already have a couple of those.
