I find it helpful when being subjected to Twilight movies to start by assuming that Bella is hallucinating most of the time, and that there are no vampires or werewolves at all. Some of what she sees is probably real - for example, she probably did encounter an odd family named Cullen - but the glittery skin, being carried to the tops of trees, everything inside the Cullen house and especially the rival vampires are all in her head. Basically I spend my time trying to piece together what she might have seen for real that leads her to hallucinate these specific things.
Mokalus of Borg
PS - The end result is tolerable.
PPS - I still laugh out loud at some bits, though.