What Do You Do That You Shouldn’t?

We all do things that we know are bad for us, for our individual selves or for our society or for our environment. And yet for one reason or another, for pleasure or convenience, for personal ease or peer pressure, we do them anyway.

What do you do that you know you shouldn’t?

Related questions: How much of our thoughts are our own? What are our responsibilities to others? How do you define success? When is it useful to fail?