A friend's regrets thread on a bassist web board prompted me to think of something that has been in and out of my head over the last several years as my oldest son has been playing in my band.
You younger players SHOULD listen to this and absorb it, but I know you won't. That's OK because I know exactly why that is. I was there once myself.
Several other "older" musicians as well as the teachers at your schools, uncles, guys at work and others have been trying to give you something. You roll your eyes and smile and act like you're listening for a little bit and say "thanks man, but it's not like when you were young" and then you go on your merry way tracking dogsh!t all through "your house" as you go.
What I'm rambling up to is this:
We're trying our damnedest to give you the keys to the friggin' Time Machine.
What this means is that if we knew at 20 what we know now, there'd be several things we'd do different. Not always major things, but there would be changes none-the-less.
While things are different now, so are they the same. Someone tried to give us the same keys and we laughed at them at said " I know what I'm doing Old Dude!" and we walked right through the same kind of dogsh!t in the 70s and 80s.
Listen a little and try to absorb more than you really want to. Not just in your music experiences, but elsewhere in your life. The keys to the Time Machine are here NOW.