The great thing about revision is that it's your opportunity to fake being brilliant.
Unless you're writing for a humorous effect, elves or space aliens and all creatures who aren't human should at least be as strange as, oh, the French.
It is better to write a bad first draft than to write no first draft at all.
There are no rules in writing. There are useful principles. Throw them away when they're not useful. But always know what you're throwing away.
Moving around is good for creativity: the next line of dialogue that you desperately need may well be waiting in the back of the refrigerator or half a mile along your favorite walk.