Protect Your Hearing!
They're your most important possession as a musician!!
Seriously people - protecting your hearing is one of the most important things you can do if you are into music!
1. Don't listen at crazy volumes.
2. Get some Ear Plugs and USE THEM (especially at loud concerts!).
Good quality headphones will allow you to listen at a quieter volume and still feel the vibe! So I'd recommend that as being a very helpful hint. I use KRK headphones, but go listen to some premium cans (headphone slang) and hear what an amazing difference it can make to how you enjoy music.
I've been using ACS custom moulded ear plugs (which also double as in ear monitors) but they're not super comfortable so might check out others next time I need to replace them.