I am heading to a few cities this summer and am wondering where anyone buys their tickets for games. Are there and sites significantly better than others? Help...

StubHub is one I've used. Don't know if they are necessarily better.

Your best bet is to buy directly from the team. They will have the cheapest prices. For places that sell out, I generally use Stubhub, though it can be a bit pricey.

Three years ago, I went on an 8 city tour of midwestern teams.

Unless it's the Yankees or the Cubs, you're not going to have an issue going up to the gates and buying tickets at the door (or online directly). Even the Cubs usually have a scattering of crappy seats up until gametime (unless its a Sox or Cards series).

If you want good tickets, go to Craigslist on the day of the game and look for tickets there. You can usually find some season ticket holder looking to get rid of some at the last minute.