Debate tips anyone?

Well, I'm going to be a junior communications major and am looking very much forward to my public advocacy [debate] cl. It's a 400 level cl which isn't the part that scares me, it's the fact that I tend to get offended when I'm losing an argument [yes I am THAT girl haha]. Any tips to keep my cool and close out a debate in style [and with a win of course]?