Here are minor-major arpeggios that can increase your left-hand speed and precision. You have to play a minor arpeggio on a chord and then a major arpeggio on the next one. For example you can play:
Gmin7 - Abmaj7 - Amin7 - Bbmaj7 - ...
I've shown you arpeggios for this four chord but you have to continue as possible all over the neck (up and down!).
Usually I start from Gmin7 on 3rd fret, I reach Abmaj7 on the 16th, and then I go back to the starting point.
When you've found precision increase speed as much as possible. I play this arpeggios every time before starting groovin' with my Fender Jazz Bass.
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