Avoid things that make snoring worse. Alcohol, sleeping pills, coffee, and fatty foods before bedtime can all increase snoring by making your throat muscles relax and narrowing your airway. Large meals and fatty foods likewise restricts your airflow by pushing up on your diaphragm.[1]
Smoking can also be a frequent cause of snoring, and is a health hazard in general. If you're a smoker and struggle with snoring, consider quitting.
Consider losing weight. Fatty tissue in the back of the throat is often the cause of snoring. Losing even a little bit of weight can be greatly beneficial if you want to stop.
If you regularly take any kind of medication, talk to your doctor about alternatives. The drugs you're ingesting might be making your snoring worse.