Article by BR Tabatha
Depending on where you find your 'scientific research'; forming a new habit can take anywhere from 3 weeks to 3 months.
And it seems to be a general consensus that New Year's Resolutions that include breaking old habits and forming new ones, are the hardest to keep. Why? My guess is because they're not on your clock. You'll only give something up when YOU are ready to, not when the calender tells you you are.
One great tip for a successful result is instead of resolving NOT TO DO something, aspire TO DO something. Remove the negative connotation and it's immediately more doable.
Committing yourself to a New Years resolution can be a difficult task, but it’s important to remind yourself that if it only takes 21 days to form a habit, so if you get into a healthy routine, it will become part of your lifestyle.