Be useless. So no one can use you. 

@catsalad my uncle taught me once unironically, "If you do juuuuust barely better than bad of a job, no one will ask you to do that again."

It's a little unethical, but it stuck with me for life. Family always asked us to do things, because we did them well.

I'll never, ever, forget the spraypaint job he did on a fence that was just good enough, but also got a lot of the grass" by accident."

He's a fucking genius and we never had to paint again.