The above link leads to some great guidelines that can be used in both RP and just regular shop posting.
Read them and follow them.
1. Follow Gaia's TOS!
2. Please label your threads accordingly; ORP or PRP. Other labels that may be seen so far are CQ (class quest) or event just P (prompt).
3. Don't God mode. It's annoying and very rude.
4. Be literate.
