Safe environments
Listening to earphones and headphones whilst driving cars or riding bicycles isn't safe.
A Warning About Volume
Your ear can adapt to volumes that are way too loud and you might not even realise it. You have got to be careful to set your music at safe listening levels and keep it there.
Give Your Ears a Rest
Listening for long periods can tire out your sense of hearing. You have to remember to give your ears a rest.