Lots of pattern blinds as mentioned, along w/ sight blinds. I have always found chinese drills (several short cold blinds done together) to be good for confidence building. The swish drill would be good too. On occasion I will use pop-up blinds for confidence/momentum too. Experiment and see what works best. Dogs are creatures of habit so the more times you can send her on 'back' with no popping the better - in order to establish a new habit. And don't forget to give her lots of praise when she gets somewhere w/ no pops!