Two words: warm up!
It's surprising to know that most don't know the importance of a proper warm up. That's not to say to get on the kit or pad and start to 'blaze'. Think about it - do you see track runners or athletes go all out without a proper warm up? If so, you know that they'd be in a world of hurt, based on the fact that their muscles are not properly stretched and warmed up. Playing the drums parallels this athletic example, because playing the drums is a physical thing.
With that said, what I do is play nice and even strokes on my pad (singles or doubles). Tempo is not a concern because I know what my threshold of speed is. Consistency of sound and also getting the blood flowing and getting the muscles and fingers relaxed. This exercise is done for at least 15-20 minutes, with the latter only being achieved if I have that much time to warm up for that long.
Stick grip is also a major factor. I can't tell you how many times I've read how your wrist is locking up, or that 'my hand/fingers hurt' after playing. Ease up on the tension of those sticks! This is also an integral factor in the sound that you produce when playing the drums and cymbals.
Try it, and trust me, it will benefit you greatly.