New Year's resolution

A New Year's resolution is a goal made on 1st January, which a person aims to complete within that year.

Examples

Have you made any New Year's resolutions? I want to lose weight and get fit.

My mum's New Year's resolution is to stop smoking.

Let's make it our New Year's resolution to run a marathon in 2013!

If you break your resolution, you are unsuccessful at completing it.

I don't bother making New Year's resolutions, as I always break them. 

Many people use the New Year as an opportunity to make resolutions to change their life. Popular resolutions include eating healthily and getting fit, although around 60% of gym memberships taken out in January are said to go unused.