Be respectful to the dead, courteous to those who mourn, and considerate to those who work there
Observe cemetery rules and visit during posted hours
Don’t drive fast and think about where you park
Keep a respectful distance away from burial services or other mourners
Don’t walk on the graves or sit on the headstones
Clean up after yourself (and your pets)
Read more here: 10 Things NOT To Do In A Cemetery (Plus Proper Cemetery Etiquette)