I'd try and take some of the load off of my original self to set his life up with a degree, job, girl (hopefully, but being socially awkward doesn't help especially when your getting advice from yourself). Then after the originals life is set i'd sign up to have all my organs donated, have an awesome night out (that lasts several days and a dozen bottles of vodka) and then i'd get killed. Not for no reason though. I'd make sure it meant something.