First thing everyone needs is a set of guidelines for conduct in the guild.

5: Keep OOC in OOC areas
That's where it belongs
4: Don't put words into someone else's mouth
No acting for someone else's character
3: Follow all of Gaia's regular forum rules
And ToS
2: Be literate, think about what you're posting

And as always....

1: The Golden Rule applies
Do unto others as you would have them do unto you.

And that's pretty much it!