I definately agree with turning it off. I always do that when I know I'm getting really close to my daytime minutes.
Something else you could do is just ask them when they call if you can call them past 9 if you have more or free night/weekend minutes.
Unlimited mobile to mobile minutes have saved me many times from going over my daytime minutes! With Sprint, it's only $5 more (at least w/ my plan) and since they are unlimited I can call my family or boyfriend or friends w/ Sprint for as long as I want
