Warm up and stretch for a while when starting to playing. I do simple things like:
- bending my wrist forward and hold it and then backwards and hold it. Both hands.
- Then reach both arms up above my head and just shake the shit out of my hands letting my hands and fingers fly all around
- Then play warm up exercises a little bit
- Them start playing some easy rhythm parts and simple melodies
Just takes a few minutes but over time it makes a difference