[NinjahZ]

Firstly, you need to be able to speak fluently in what ever language the server is.
Make sure the players & other Administrators understand what you are saying.
When you punish rule breakers explain carefully why.
Be yourself.
Be Generous but fair & firm.
Try not to make double standards with players.
If you are an Administrator on a popular server you need to understand that everything you do or say will be held against you from other players/Admins.
Don't abuse power. (Duh)
Keep active and help EVERYONE.
This next one will really come across as common knowledge but you would be surprised what Admins don't keep to this one simple Action which causes grief.
***Don't hold grudges on players that come across stupid/immature***
Meaning, if they have called you names in the past, let it go.
You are an Administrator, you need to act as if this is your Job, cause really it is a Job.

Depending on what Rank of Administrator you are, you may be required to do secondary tasks.
such as Faction Management for an R-P Server.
or Team Management for T.D.M etc.
Them tasks need to be done successfully.

The BIGGEST RULE OF ALL!
- Always. Be. Proud. Of. The. Server.