There are only two things to worry about: Either you are well or you are sick. If you are well, there is nothing to worry about.
If you are sick, there are two things to worry about: Either you will get better or you will die. If you get better, there is nothing to worry about.
If you die, there are two things to worry about: Either you will go to heaven or you will go to hell. If you go to heaven, there is nothing to worry about.
But if you are to hell, You'll be so **** busy shaking the hands with all your friends, *You won't have time to worry!
Although not "technically" a poem, I came across the one day and found it too humorous to pass up.