Several things,mostly though 1. Drinking even just a tiny amount of alcohol - just that sometimes it would be nice to have a glass of wine or one gin and tonic without having to worry to pieces whether it induces a migraine (it does 80% of the time) ; 2. Sleeping in new places without worry, because for some reason when I go to a short trip or when I stay at a friend's place, if I haven't slept there before, I will get a migraine. Heck, on rarer occasions i even get migraines when sleeping at my home.... And I do have the memoryfoam pillow.