if you're trying front swaps, try to dig your heel into the side of the box, almost like you were going to try to stop, because you're trying to create as much friction as possible. set your shoulders for a 180, and when you feel like its the time, just pop, bring your shoulders around, and your feet will follow. if you commit, I'll guarantee you'll make it full 180. oh and in my opinion its easier to learn them on boxes, but on rails theyr easier to set because they're narrower