I think that one of the keys to keeping both your WoW life and your real life balanced is by identifying your priority list. Every once in a while do a reality check and make sure you're keeping it in line. For me WoW sits somewhere between work and sleep (then again, I've never slept much). My guildies know that I will not be on on Friday nights, that's "sister time." I do play WoW when I'm on work trips, but I never go anywhere particularly exciting.
If you find that you're having trouble with focus on the real world, or your seriously considering making your own WoWPod, you may need to make some adjustments. You can try keeping a calendar to schedule your play time around your outside obligations. You may find that you need to drastically decrease your play time, you may even have to give up the game all together.
If you find you're seriously slipping, you can and should seek professional help. Ask your doctor or school counselor for a referral. Remember: don't replace WoW with another another unhealthy addiction. Keep in mind that there are some things that are more important than WoW.
Where does WoW fit on your priority list?