yes definitely want to NOT look at what you want to avoid when you are mtb. If you are worried you will endo over that rock, funny enough, your psychic powers will be true and it WILL happen. Pick your line and follow it. Never mind the "other" stuff around.
my two major rules for mtb:
1) keep your weight back
2) don't think. just go. gravity and your tires will know what to do.