When your relationship is on the rocks, when you don't know how to talk to your crush, when you have no idea how to please the object of your affection, just ask yourself this simple question: "What would Sandy Cohen tell me to do?" Over the course of The O.C.'s four seasons, Peter Gallagher's plainspoken patriarch gave tough-love advice like no one else — and, since this happened on The O.C., that advice often had to do with matters of the heart. As part of our anniversary-week celebration, Vulture compiled some of Sandy's best relationship tips in this video. Young or old, single or partnered, we all have something to learn about love from Mr. Cohen.