This should help a lot of you who are addicted to mmorpgs.
The first step you should take in an mmo is never make friends in the game. If you do, make sure they have aim and don't play the game 24/7.
2. Never join a guild. You could be the best of the best and not have a guild. You don't have to have a guild in order to have fun. Guilds give their members schedules and are mostly made up of people who don't play other games since they are committed to making the guild a success. Guilds also bring drama and unpleasant things such as promotions to people who are more active than the casual players.
3. Don't create a schedule around the mmo. Schedule your every waking moment with the idea that the game isn't as important as putting time into things such as socializing with your friends or giving that extra effort to your work projects. Go watch tv if you don't have many friends. At least you're not committing to it.
4. Play other games that are not mmos. I've heard of people playing 2 or 3 different mmos at the same time. They wonder why their addicted. Buy a console if your pc is not upgraded. Maybe invite a couple friends over or make new ones with your gaming interests.
And what you can take from these steps is simple. Never commit yourself, make a schedule around, or get your real life friends/wife/sister/father/mother into an MMO.