Like Bathsheba, we don't really budget, but we do live on one income, and donate nearly $700/month to the church and Christian school that our children will attend. So we know how to live a little tighter.

Just wanted to add a couple of things -
DON'T impulse spend! Go home, think about it, wait a while, talk to your DH, and then decide whether you really need that item.

NEVER pay for things with your credit card that you don't have the money in the bank for. We have a credit card that earns us points towards free groceries, so I use it for purchases on occasion, but I pay it off immediately online when I get home. No surprise bill, or late fees, or outrageous interest.

If you want to eat out once in a while for a special occasion (and make sure you save it for special!) try going out for breakfast instead of dinner. It's way cheaper, and often you get so much food, you don't need lunch!

Shop second hand for as much as possible. I have bought pretty much all of my children's clothes second hand, and I think they look great. I buy all good quality, brand name stuff that is in great shape (hurray for everyone else having only one or two babies ) and it will last a long time. My stuff was bought second-hand for my first DD, and has been used by my three girls and my sister's two girls, and much of it is still fine!

Give up satellite/cable TV. Seriously. You won't miss it. (after a week or two, anyways.) You'll find you and your DH talk more, read more, play more games. It's much nicer for you as a couple, and much cheaper that way!

Learn inexpensive hobbies. Scrapbooking can cost an arm and a leg, if you want your stuff to look like the examples in the store. Knitting and crocheting, and even quilting, I find, are cheaper. The library is cheap. I'm sure there are lots more.

Don't have a gym membership. Go for walks!

Oh, and BTW, apparently the dishwasher is more efficient than handwashing! Who knew?! But maybe that's just for water usage?

Congrats on the new house!