well, you can try to be safe, and try not to be stupid, and you will less likely die due to your own stupidity.
however, every second you are alive, you have a chance that you will die. a meteor could strike the earth and kill us all. a car could crash randomly and kill you as you're walking down the street. you could be accidentally poisoned by the whole wheat bread you bought in the grocery store.
just do what makes you happy, live every day like it could be your last, and try to avoid killing yourself in stupid ways. you should outlast the idiots, but you never know, you could be dead before i'm done typing this.