What is Your Favorite Proverb?

Ok, I am looking for a cheat sheet. I got this email from the leader of my church community group (small group):

We are really excited about resuming our community group . . . We’ve really missed meeting together over the summer . . . All of the community groups will be studying Proverbs this fall so be thinking about your favorite proverb or your favorite lesson from the book of Proverbs. Also, be thinking about what you would like to get out of the time we will spend together in this book. We should have the study guides ("Proverbs" from the Navigator’s Life Change Series)

Certainly, if you have a proverb you like from outside the Bible - bring it on. It just won't help my Old Testament study deficiency.