If you’re a chronic snorer, try these suggestions from the National Sleep Foundation:

Lose weight — dropping pounds should reduce the amount of fat deposits in the throat that can obstruct the airway and cause snoring.
Sleep on your side rather than your back.
Avoid alcohol before bed, and stop smoking, as both can contribute to snoring.
Try a nasal breathing strip, designed to help keep your nostrils open during sleep.
Ask your doctor or dentist about appliances that can help reduce snoring.