Do practice trumpet, it actually is cool.
Don't sell the Hoshino Gakki Cimar for $100.
Don't trade the black strat for that weird, stupid 70s SG.
Don't sell off 90% of your boss pedals, you'll end up buying them all back for 3-4x times what you sold them for.
Don't give away your '63 Hofner to a dude who won't play it and eventually sells it.
Don't buy so many stupid fuzz pedals that you are absolutely capable of building.
Don't sell your Fostex R8 you dumb idiot.
Do buy the broken RE-201 for $250, and definitely don't sell the Korg SE300.
Don't let your brother smash your DR-110 with a fireplace tool for the sake of performance.
Buy at least one YBA while they are below $500.
Don't sell the white strat either, there are other ways to buy wine for your wedding.