Neighborly Etiquette for Snow Removal

This is the second winter that i've owned my home. Thankfully, i don't have a very big section or sidewalk or driveway than i need to clear snow from. What's the neighborly etiquette for removing snow? Some of my neighbors get out there and remove snow so quickly. If it snows overnight, do i have to take care of t first thing in the morning? I can't wait till i get home from work.