PLEASE ANSWER!!! QUESTION I NEED TO KNOW! Agility?

I really want to know how to be more agile, like shane williams, or anyone like that. I look it up all the itme. (answers: run the shuttle run... jump rope...) but how much could these really help? I want to know how to juke/jink really well. how to have actual power behind it. what exercises could I possibly do? thanks for your answer! :)