All excellent advice

The other main tip is to avoid clipping a signal at high volume. Sound is a pressure wave throught the air - clipping produces square waves at high SPL - a square pressure wave hitting your unbelievably sensitive eardrum and the tiny tiny tiny little hairs that reside behind it is highly damaging.

To use a slightly weird analogy imagine standing in the sea. If a powerful wave washes over you it affects you strongly but it passes through you. If a big fat **** off wall of water slaps into you its going to do some damage.

Take breaks. Avoid loud clipping signals.
Also - don't play headphones too loudly! Far too many people rag headphones far too hard and they can be really damaging.