Since it was raining this afternoon, I decided just to hit a couple buckets of balls and try out a few slight variations on my swing.
Thinking "relax the arms and rotate the waist" was the perfect combination that helped me hit the ball sweeter and farther.
There are a million and one things about the golf swing that can and will go wrong if you try to think of them all at the same time.
Keep your head down or follow through or don't fall back or stand firmly on your feet or hold your head absolutely motionless over the ball or slow down your swing or imagine throwing your club at the flag or stand farther from the ball or stand closer to the ball or do the waggle twice when addressing the ball or keep your left arm straight or whatever.
Never ever try to remember more than one or at most two tips when trying to hit the ball at the same time.