1] Be neat when writing your guides
2] Do not use profanity or racism in your guides
3] If you did not create the guide you are posting post a disclaimer at the end of your guide saying so
4] Try your best to use correct grammar and spelling
5] Do not post guides that is common knowledge such as how to level a bandit or a sin.
Also, try and use common sense when making guides. If you think it's wrong you probably shouldn't do it.