The specific nature of the crash determines your options as well as what is even possible.

I am a huge fan of the tuck and roll and always use it unless circumstances demand something else such as needing to vault yourself to avoid being crushed after an imminent collision with a car.

For most non-impact accidents, I think it is preferable to stay locked in on the bike (elbows in, feet in the pedals, hands on the bars) and think this has prevented me from significantly worse injury in a few crashes.