vitiman c, lots of it. take some C pills you get at wal-greens. I have never read anywhere that says it does increase the trip, but when i eat like 2 to 3 thousand milligrams of C i can feel the differnce, a much better trip! also tripping is all in your head, so when you take the hit or hits, tell your self that in an hour your gonna be frying balls, and in two hours you will be on the moon. If you sit around waiting on questioning everyting you feel your gonna get a shitty trip. well this is only from my experince with lsd.