Credits to whoever came up this (definitely not me), I found it in the old Backyard of the Playpark forums v.1 which is now known as Asiasoft Forums.
1. Verbs HAS to agree with their subjects.
2. Prepositions are not words to end sentences with.
3. And don’t start a sentence with a conjunction.
4. It is wrong to ever split an infinitive.
5. Avoid cliches like the plague. (They’re old hat)