sure it's a good rule to live by. i told myself i'd live by that rule when i started out as well. that lasts about 2 weeks . (now i'm up to about 3g/day)
but hey if you can hold out a week at a time, you won't regret it when you smoke: you'll get higher since your tolerance would be low, plus you'd have the high-experience spaced apart so you'd end up eh.... cherishing the high more i suppose. thinking of it as a treat.
good luck!