What techniques do you use to keep your voice healthy and prevent strain?

Techniques you can use to keep your voice healthy

• Drink plenty of water
• Get plenty of rest
• Vocal training and singing lessons will take you a long way. Remember you are going to be using your voice a lot.
• Learn how to warm-up and cool-down your voice. 
• Try to refrain from yelling, and if you are going to yell, learn to do it properly (yes, that is a real thing).
• Smoking can tear your voice up.
• Drinking dries you out.

Hope these tips help.