I would apply for every credit card known to man. Even the high interest ones. Then I'd take my wife and son on a 6 month journey around the world. If, when we returned, we found out that I wasn't going to die after all, I'd have to do myself in because of all of the bills.
Aside from that plan, I'd probably make amends with some of the people I have quarrels with (then I'd have their sisters give me a "rusty trombone" or a "dirty sanchez" for messin' with me in the first place).
I'd quit my job straight up at the beggining of the 6 months. I'd tell a few of the people I work with off.
I'd probably start juicing again too (haven't in about 7 years). I'd probably hit it hard too, since it's doubtful I'd see any serious side effects in 6 months if I did it intelligently.
I'd probably spend the last month making sure that the people around me were going to be "okay" and that their lives would still go on, because man...it would really suck for them without me around.