Ask yourself, "When does this decision have to be taken?" and having answered it, defer the decision until then, in order to give yourself maximum pondering time.
Give your mind as long as possible to come up with something original.
A man will give up almost anything except his suffering.
As Daniel Levitin writes, our brain is a "giant pattern detector." If we read something that coincides with what we already believe we're more likely to give it credence, while the opposite is not true.
On movies, I like to involve the cast in the writing of the script. I like to have a rehearsal period, after which I do the last draft, which gives me a chance to incorporate anything the actors have come up with during the rehearsal period, so I'm very inclusive as a writer.