In my opinion, the best approach is to simply pretend that you only have 90% of your take-home pay. If your paycheck is $800 per week, then figure out how to live on $720 per week. And don't say it can't be done ... because if your paycheck was $720 per week I'm sure you'd figure it out!
When we were young, someone told us that if we ever got a raise we should just save it, and live as we always have done. Years later, we find we just don’t need everything our peers find “necessary” and it’s not like we miss that lifestyle because we never had it. Those kind of hints help, because if the money stays out of your checkbook, you do tend to live within your means. You can instruct your employer to direct deposit the sum right into savings.