It helps to plan your pass in advance, and on twisty roads with short straights and limited lines of sight it's vital. Leave some space between yourself and the car you're following, and as soon as you see the corner exit, begin accelerating. If it's safe to pass, go for it. If not, slow and wait for another opportunity. Should you find yourself behind a procession of sightseers in motor homes moving at parade speed, consider stopping for gas or a snack rather than making a series of hairball passes. Sometimes, discretion really is the better part of valor.