There's also tax breaks many times where people wouldn't expect. Some States waive hotel taxes for example (which can be 1/3-1/2 the price of a room) when your booking places for your cast and crew to stay.
All the big incentives I've read about are for bigger budget productions though. If you're bringing in a crew on a $1 mil or more feature then you can find some nice incentives in states that don't normally get as much film work compared to shooting in Los Angeles for example. I'm sure there are incentives for lower budgets to be found, I haven't spent a lot of time looking personally, but I haven't seen many.