1. Don't have a big smile on your face
    Saying something funny with a straight face makes it even funnier. You can smile while everyone else is laughing.
  2. Use your eyebrows
    Sometimes, raising an eyebrow when someone is being weird and following up with a quick remark can provoke a few laughs.
  3. If a word has more than one meaning, take advantage
    Props to Google for my amazing example