I was going to say, take an ice chest of beer, but others have already advised that. Golf is such a frustrating game, my suggestion would be to go completely easy on yourself, don't criticize your play because it's gonna su**. You can't just pick it up like some sports and if you are athletic and used to playing well, you might lose your mind (or your cool!!).
Go out to enjoy the beautiful course and the gorgeous day! Just don't worry about the golf part
Don't throw clubs in the water, toward the cart, or at other players!!
NO LIE - a friend of ours was out playing and got frustrated and threw the club at his bag in the back of the cart. The club ricocheted off the cart, broke, and the sharp broken end came flying back and impaled him in the calf!!! He had to be carried into the club where there was (thankfully) a doctor that could stop the bleeding, it had severed a major vein. He ended up having to have surgery and was in the hospital for a couple of days.
Boy, he'll never live that one down

!!