i have 2 for skiing, one of good music to shred to (depends on your musical taste) and my straight up gangster playlist.
I start by going through my entire music library, and selecting songs i would like to ski to.
from there, i narrow it down further, and take out songs that are okay, but not really good. That's my first playlist.
For my gangster one, I take my first playlist, and remove any songsthat arent thug as fuck. Then i go through my music library again, and put any other gangsta songs in.
Then depending on how i feel that day, i play one or the other while shredding.