My sisters and I all married snorers. One of my brothers-in-law went to a sleep clinic that gave some suggestions on how to avoid snoring. The one that works for him is, and I'm not kidding!, sewing a tennis ball onto the back of an old T-shirt (I guess you actually sew a pocket on and put the ball in that). He wears this at night and it keeps him from rolling onto his back which is the position he normally snores in.
It's nice that you care enough to try and solve the problem! Good luck!!