How does your team crimp terminals?

[BitTwiddler]

I'm the electronics mentor for our team and I'm getting ready to hold a class in electrical fundamentals in the coming weeks.
I've been reflecting upon a chronic problem that seems to rear its ugly head every build/competition season - failed crimp-on terminals.
I try to watch carefully when a student completes a crimp and I make sure to do a tug test afterward. Yet later during testing, practice or worse during competition, a crimped terminal will fail. Especially at the motor controller. Its frustrating to say the least.
I'd like to hear what your team does to ensure that crimp-on terminals don't fail. I'm sure many of you have experienced similar problems. While I have experience in crimping terminals I'm no expert. I'd prefer to solder all my electrical connections but that's not always practical.

Thanks,
Dave Tanguay
Electronic & Programming Mentor
1726 N.E.R.D.S.