If you are contemplating a larger purchase or are prone to impulse purchases of expensive things, consider implementing a few rules to help prevent future regret:
These simple budget adjustments will be a great start to taking the self-inflicted pain out of your wallet so that you can have financial gains, not financial pains.
The best way to avoid money fights, or at least have more productive money discussions, is to have a better understanding of where your partner is coming from and keep that in mind when you have disagreements.