The provisional cast-on methods differ only in how the loops at the bottom of the knitting are temporarily secured. Most methods call for securing the loops with waste yarn that is later removed and discarded.
How To - Fix a twist in cable going in the wrong direction. Yarn Harlot shows two methods: the proper way and a nice little cheat. Much better than ripping your rows back and then your hair! Pinning now because I know I'll need this later.