I don’t think I’ve ever had a music technique post on this site, but as you may know, I am a musician as well. Here’s a little tip! A lot of guitar players I’ve met have weak pinky fingers in their left hand. Here’s a good way to get that dexterity up:

G|—————5—————8–7–6–5——————
D|–5–6–7–8——8–7–6–5—————8–7–6——–
A|————————————————————-
E|————————————————————-

You can shift this pattern to any key you would like.  I also like playing this patten on a bass since it stretches your fingers a bit more. Most importantly, play it as slowly as possible ensuring your attack is even on each note. Build up your speed over time.

Good luck!