The reason could be because January is a sad time of year for some people following the celebrations of Christmas and New Year.
This makes it much harder to give up the things that cheer you up.
Experts say the secret to sticking to your resolutions is to introduce them slowly so you don't feel deprived.
Give up slowly
Or if you make it your mission to keep your bedroom tidy you could begin by tidying it once a week instead of never.
This way you're more likely to keep your promise because you won't feel like you're missing out.
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