One of my close friends almost got a divorce from his wife over money. They ended up going to counseling for it and it completely saved their marriage. She was always on him about his spending on toys like surfboards and snowboards. In turn he would try to argue about her spending on clothes and such to no avail. In the end, the best suggestion that worked was that they sat down and worked out their monthly budget. This included mortgage, food, bills, retirement, etc etc. The last thing they set aside was an amount of money for both parties. Say $200 each for example. That $200 was free for each of them to spend how they wished. They could save it for something bigger or just blow it the day they got it. Both say that alone helped the most. It took the feeling away from her that he was spending money that could be used elsewhere.