Over the next few days, millions of Americans will make resolutions to better themselves in the new year.

They will then promptly begin breaking those same New Year's resolutions -- some before the sun rises on the first day of 2013.

Depending on which survey you believe, somewhere around three-quarters of us won't even make it three months. Another survey -- apparently there are no shortage of them when it comes to resolutions -- by the University of Washington suggests that less than half of that successful quarter of resolution-makers succeed on the first try.

If you're anything like us, that math has your head spinning and considering another New Year's resolution.

Of course, some resolutions are harder to keep than others, and which ones you choose will make all the difference in your chances of having to make the same promise to yourself next year ...

No. 5: This year I'm going to do more ...

One of the biggest mistakes people make with their New Year's resolutions is biting off more than they can chew.

Many people vow to do more in the new year. More traveling, more reading, more anything. And while these are great goals if you spend a lot of time doing nothing, for most people that's not the case.

We are already overcommitted. How much free time would you say you have right now? Now factor in some time-consuming resolution into your plans? Do you really think you're going to be able to stick with that resolution now?