Try to make good choices, not just diving into things without considering the possible outcome.
Make reasonable effort to make the right choices using your thinking abilities, and past experiences.
Avoid repeating past errors, and expecting a different result.
Gee, I don't think I could even have a "favorite" mistake. Mistakes are things I try to avoid, not nourish, and keep trying to repeat. That's why they are mistakes, and not deliberate acts of ignorance or stupidity.