One of the best ways I find to keep my ethics in with money is to be honest. Suze Orman talks about this and it's a superb way to get it right!
Next time you want to buy that great pair of shoes, or newest video gaming system, ask yourself if you honestly need it and if you can afford it. Here's the good part, be honest in your answers to yourself and follow through.
Depending where you are on your financial journey, you don't have to need something to buy it. For most of us, we have indulged ourselves into deep credit card debt and would very much like to get out from under that burden. So if you need to use a credit card, then you can't afford it. Only you can determine the need part, but I've yet to meet someone who genuinely needs a new video gaming system! Laughing! (Yes, honey, I hear you. No, we don't need a PS3)
As Dave and I evolve as a couple, we've made some really great progress with our finances. For us, this is where work in marriage comes in. We do a really good job, and then some of those old habits creep back in. At that point, we'll catch ourselves and get back on track.
Being honest isn't always easy, with money or other areas of life. But when you get honest, things ultimately get good. It may not appear that way at first because it may be uncomfortable and even painful. The god part comes when you now have a strong, solid foundation to make your next few decisions from...honesty is the best foundation to build any future anything on!