1. Just because you didn’t get married or have children doesn’t mean you have to have a boring spinsterhood. Miss Marple is a bad-ass feminist and also, she is alive. See, falling in love usually ends in murder. DON’T GET MARRIED OR HAVE CHILDREN, ONE OF THEM WILL END UP MURDERING YOU.
2. If someone mysteriously invites you to a retreat in a mansion with a bunch of other people you don’t know, don’t go. This also goes for package tours. Inevitably, you’ll all end up being strangely and dramatically connected and one of you will end up dead or accused of murder, or both. It’s not worth it. Buy your own holidays and sleep soundly at night.
3. Don’t trust the nanny. Or the charming man. Or the prettiest woman. Definitely don’t trust the nun. DON’T TRUST THE PEOPLE YOU WANT TO TRUST, THEY’RE ALWAYS THE MURDERER.
4. Knitting is an excellent activity that stimulates ideas. It’s not boring women’s work, it’s CRIME-SOLVING work.
5. There’s nothing stopping a poor orphaned girl from becoming a success in life. All the girl need do is to spend some time as a maid in Miss Marple’s household and learn that it isn’t done to read other people’s letters or to break the china whilst dusting. Also, she must learn that one shouldn’t gossip too loudly in public about THINGS ONE KNOWS in case a murderer is listening and gets anxious. An anxious murderer is an active murderer. The girl who gossips too loudly is the one who gets her neck snapped. DON’T GOSSIP, IT WILL KILL YOU.
6. On the other hand, gossip is, confusingly, essential to solving all murder cases. As is eavesdropping. As is forcing yourself on to people that don’t really want to hang out with you.
7. Circumstantial evidence is pretty much always faked. The only satisfying ending is one that involves a full and emotional confession from the murderer in the company of everyone still lucky enough to be alive.
8. Policemen are universally doofuses. It’s because they’re men and they don’t knit. One must help them through their inconvenient idiocy, and only listen to them when they are saying the same thing as you.
9. Things might seem supernatural to begin with, but that’s just because you’re an emotional hysteric and not a clear-eyed, steady-handed logic like Miss Marple. Alive humans are ALWAYS the murderer. (Unless they’ve been killed since they committed the murder, which is usually not the case, because it would interfere with the full & emotional confession demanded by No. 7)
10. If someone’s reading/listening/watching ‘Macbeth’, someone connected to them is going to be murdered. Or, maybe has already been murdered. Also applies to other classic tragedies, such as ‘The Duchess of Malfi’. DON’T WATCH TRAGIC VERSE DRAMAS, IT LEADS TO MURDER.