I keep it simple. The following is my directive to my family: I do not do Novus Ordo weddings and funerals, so do not ask me. Usually once you tell them this, they will get a clue and not invite you to Holy Communion and Confirmation parties, unless they are mentally vacuous. I do not do "celebrations of life," because if you are in hell, there is nothing to celebrate. I tell my pigeons who try to get sober, "If you die of alcoholism or a drug overdose, I am not coming to your funeral, and make sure you tell your parents and all your relatives what I said." This will usually make them try harder, at least for a time.
I remember a lady once asked Fr. Wathen if he would stop by the funeral home and say a few words about her husband. What a mistake that was. Fr Wathen showed up and said, "Well, ...(insert name) would have had the greatest difficulty making it to heaven."