I started again somewhat, with very strict limitations.

1. No raiding, duh.
2. No dungeons unless it's on the weekend.
3. No playing my main character(level 70 is when you start doing all of the crazy ass grinding stuff.)

Plus I just keep it mixed up with other games. It's working alright so far, but I won't hesitate to quit if I get back how I was before, or even close.