A little faster, pretty please...

• Even though rules state that the person with the lowest score from the prior hole tees off first, and that the person furthest from the hole goes first, "ready golf" is acceptable etiquette within safety guidelines, of course. Unless you're in a tournament, there is no reason why you can't tee off first if you're the first to the tee. It's always good to talk this over beforehand and make sure your playing partners agree.
• Write your scores down on the scorecard in the cart or at the next tee, not on the green you just finished.
• Same thing with head covers, put them on in the cart and put the club in the bag on exiting the cart prior to your next shot. The pageantry of replacing the head cover as practiced by some golfers can drive you nuts.
• If two to a cart, drop the rider off at their ball and have the driver proceed to his/her ball.
• Always take enough clubs for the shot that might be encountered. If you think it's a 7-iron into the green, take your 6, 7, and 8-iron with you.
• When near the green, drop off the person furthest from the hole first, then go park the cart on the cart path near the green.
• When near the green, take your putter, as well as your wedge.
• Always carry a second ball in your pocket just in case you lose the original ball or need to hit a provisional ball. It saves the time that would be wasted going back to your cart to dig another ball out of your bag.
• Try to remember at least approximately where you hit the ball.
• If you can't find the ball rather quickly, drop and press on.
• Golf is golf, fishing is fishing, on busy days, leave the ball retriever at home and press on. Heck a ball retriver, might as well bring scuba gear if fishing balls is your thing!
• No more than two practice swings.
• Develop a quick routine, not a quick swing.
• Don't try your pick-up lines on the cart girl, wastes time and you have a much better chance of making an eagle.