There is no shortage of grammars, particularly of English, which will tell you how you must write a language, oblivious to the way in which people today are actually using that language – the cardinal sin of prescriptivism. I thought that you might enjoy, and enlarge upon, some entries submitted for inclusion in the English version.
- Be sure to never split an infinitive.
- Prepositions are bad to end sentences with.
- Passives are best avoided.
- Circumlocution and undue emphasis on subtlety may not be as effective a way of getting your message across when more direct and concise framing is preferable.
- But you should not start a sentence with a conjunction.
I welcome amendments to the above, and suggestions for new entries to bring colour to the cheeks of every prescriptivist.