If you're thinking that New Year's resolutions are passe, you're not alone. But you might want to make one or two anyway — especially when it comes to your finances.

According to Fidelity Investments' sixth annual New Year Financial Resolutions Study, fewer Americans are making financial resolutions for 2015. Only 31 percent said they intended to do so; that's a 28 percent decrease from last year's 43 percent, which was an all-time high for the survey. 

But here's the thing: among those who had made resolutions to improve their finances last year, a higher percentage — 51 percent — reported being in a better financial position than among those who didn't go through the annual New Year ritual.