Here you go!

I just recorded a lil video where I show some simple exercises you can do. I myself don't do this enough but it is really helpful for players of all levels.

Its basically the tools for a simple 5 minute left hand warm-up routine. I have to say I'm tired and and lessthansober so I'm having some difficulties playing (and talking in English too) but I tried to make it short and sweet, and gave most time to the (last two) most important concepts.

Let me know if you have any further questions or if this was helpful to you :)