Set goals for yourself that have nothing to do with your opponent. Stick to them, don't worry about what he's doing. My goals are always the same. Shoot 40 or under on each 9, score nothing worse than a 5. The only time you might want to implement some sort of strategy is whether or not to make him make some short putts early or give them to him, that way when he has to make one, you haven't let him roll some short ones yet. I don't care about who hits first into the green. I let the hole dictate what I do off the tee, not my opponent.