A few tricks you can try:

These are well-known "tricks".

1. Drink a lot of water/tea, etc;

2. Keep your room warm, and humidify/filter the air if you can;

3. Avoid smoking (including second-hand smoking from your family members);

4. Avoid stress;

5. Balanced diet, eat a lot of fresh fruit and veggi;

6. You may try some home remedy, like pear soup with cube sugar, etc.

 

Good luck!