Let me go on record as saying “It’s very important that you continually challenge yourself and don’t just repeat the same thing over and over again.”
Well, there are two hand warm-up exercises I use, consistently. Bear with me while I figure out the best way to include tabs on this site!
Simple and effective! Once you are comfortable with this position try to increase the speed while maintaining control and proper technique. Also use this lick all around the neck, up, down, and side to side.
“The Gnome” (I think of the Travelocity Gnome when I play this.)
Once again, increase the speed over time and change the position to keep your fingers guessing.
To wrap up, this are just my 2 favorite. I’d love to hear from others what they find themselves doing every time they pick up a bass!