In this classic episode of the Mary Tyler Moore show, Mary throws a dinner party. Her obsessive-compulsive friend Sue-Ann offers to make dinner, but prepares exactly six portions. Watch the first minute or two of the scene, when a guest takes more than his share.

Has you ever run out of food for your guests? As hosts, we have to balance preparing more than enough with having to throw out leftovers. And just like at Mary’s party, the unexpected can happen: Someone who offers to prepare food doesn’t bring enough, extra guests turn up, or one guest is unusually hungry. Maybe a dish you plan to serve gets ruined.

Here are some tips for when you realize that you may be short on food when company comes.