No one visits me so my plan is to leave a subtle note on the door saying call the police then order a pizza a week in advance.
Only issues with this is if I get a religious visit or something but if I do it at 10pm then there is no way anyone would knock before say 7 am anyway.
The pizza idea is a good one. Domino's has future orders. Won't work for me though since none of the chains deliver to my area. I'd still prefer to avoid the risk, however small, of somebody coming to the door and finding the notice too soon.
What could possibly go wrong with a note: Shot myself in back yard where I can't be seen by any neighbor. They hear the gunshot and they actually can ID it as a gunshot, even though fireworks are vastly more common especially now with Independence Day weekend. They call 911 to report a shot fired and cops go door to door to see if anybody happened to hear that gunshot and see if somebody is dead or if there was any crime. They come to my door, see the note, and find me in the back yard before I've bled out. I'm "saved" to live as a vegetable for the next 20 years. Decomposing for a month in my back yard is preferable to decades as a vegetable.
I'm told that gunshots differ notably from fireworks, though I don't think I could readily tell the difference despite being a "gun nut" who's fired tens of thousands of rounds. I have to hope the folks in my neighborhood can't tell the difference either. If it was January and you lived in a crime-infested inner city then it's probably gun fire, but if it's July in a nice neighborhood then I hope they'd assume fireworks.
Another idea I've seen is a note to your mail carrier to call police. I like that one better since walking to the curb to remove a note from a mailbox is a lot safer than trying to cancel delayed email. My mailbox works without electricity, when the Internet is out, after my computer crashes, when I'm locked out of an email account....
I think I'll just wait for my lawyer to notice that I don't show up for court, don't answer my phone, and that I don't paid his invoice of several thousand dollars.