1. Alot of people don't know this but cough drops actually dry out your voice.. they are for coughing only..
2. Not getting enough sleep can also affect your voice greatly.
3. Yelling can hurt voice ALOT..
4. Stress can also affect your voice.
5. Having a cough.
6. Having a cold.
7. Being cold can affect your voice alot.
8. If you dont warm up before you sing you can RUIN your voice!
9. After you warm up your voice don't drink any drinks that are cold. This will reset your voice and you'll have to warm up again.
10. Drink lukewarm WATER to sooth your voice if your thirsty during a singing practice. and drink lots of it for at least three days leading up to your performance.