Originally Posted by TennisCJC
Play 3/4 speed. This sounds passive but it usually results in a more aggressive game. Most people pull back under pressure and end up playing timid and decelerating racket speed. On EVERY stroke (except volleys), think accelerate to 3/4 of maximum speed. If 10 is as fast as you can swing, you want to swing at 7.5 through out the match. All serves and ground strokes should be 7.5 out of 10. This level is also low enough to allow plenty of room for consistency and placement.
I'd tweak this bit of advice as my recommendation and say that you should make sure you start
at 75%. Basically, you want to work your way into the match and as you get your groove going, you can ramp up from there to 100%. Lots of guys come out banging away at 100% and next thing they know, they've lost the first set by throwing UEs in all over the place.