Suplexing is the idea of leaning back and raising your shoulders to throw your opponent over your head. Suplexing is a game of risk, you need to risk getting DQ'd while falling backwards to get a good suplex. To avoid getting DQ'd, you want to contract one knee and either relax, extend, or hold the hip. Let the opponent attack how they wish, let their momentum go right into you and knock you back. Once you're at an angle and have a contracted knee (contracted knee saves your from over pressuring your hip and hence making you DQ) raise your shoulders and if you want extend the contracted knee to jump off the ground a little (helpful for getting a little bit more distance if needed). Now, you want to relax your abs and let them fly right over you. Simple. They might try to DQ your hands, simply rotate your chest to throw them off balance.