8. Being a pushover. Little things like accepting the wrong drink at Starbucks, or pretending not to notice someone cutting you in line aren’t crucial. The issue is the snowball effect that follows. People see that you’ll give an inch, so they’ll greedily take a mile. In today’s world, it’s hard to be nice without somebody trying to take advantage of your kindness. Establish firm limitations that people know better than to cross. It might take temporary sternness, but in the long run it’ll pay off.