Well done! A saving of $700 per month, $9000 per year is incredible. It's amazing how painless saving money can be, despite what's often reported it doesn't have to be about depravity. We have a wonderful, enjoyable life enhanced by the freedom from worry about money.
Personally, we don't eat out hardly at all, to save money but mostly because the restaurants are noisy, the food unhealthy and the drinks ridiculously overpriced (In Australia one small glass of wine averages $10, almost the same price as a bottle of the same wine on special).
My only regret is I didn't become financially clever sooner but if you are buying diapers you're young enough to get greater benefit from your wise choices. Excellent!