1. Ignore them!
If you pay more attention to them, they will eventually take advantage of the situation. The only thing that keep gossips going on is the fact that people would think that there is some kind of truth behind it once you react to it.

2. Karma is NOT a bitch! :D
Always try to understand that whatever you do to others is what you will be returned in the future. Believe me, time plays a vital role in nailing bad people.

3. Patience is a virtue
God gives the best things for those who wait.

4. Don't give a damn!
"Don't walk as if you rule the world. Walk as if someone rules it and you don't care who rules it."

Hope it helped!