Creatine will help your muscles perform better, mainly by allowing you to train more. You will find that they just don't get sore from the same old exercise you have been doing. They will also have a small direct effect on performance.
Some people are against supplements, but I think that anything that always helps and never hurts (except maybe your wallet) is good. Would you go without suspension?
Do not use mega-doses of suplements! That goes for vitamins too (which you should be taking).
Streaching after you exercise will stimulate any muscle tears you have created to heel quickly. It works for me and my best friend. I'm assuming it will work for most everyone else.
Make shure you eat plenty of nutritious food. You shouldn't be really scrawny (no judgement!). Having plenty of body mass will help you recover more quickly.