These seem like good rules to me. You could certainly do much worse, and it wouldn't be all that easy to make better. A small sample:
2. Don’t make happy people sad.
3. Don’t make sad people sadder.
10. Don’t use the word “literally” when you really mean “figuratively”. It literally makes me want to stab you a little but I don’t do it because that’s illegal and also because I have a very limited amount of knives.