The common belief is that it takes 21 days– three weeks– of a new behavior to make it automatic. However, the most recent studies show this is not the case; in fact there is no magic number. If there were a number, researchers say it would be more like 66 days. Researchers say some study participants formed habits in just 18 days, while for others it took 254 days. One researcher says, “To understand how silly it is to target a number like 21, consider the variety of behaviors that become habits.
Some are complex, like keyboarding and reading, and these can take years of practice to develop proficiently. Others are quite simple, such as using a new coffee maker you got for the holiday.” Experts say to keep in mind that it’s much easier to adopt a new habit than it is to quit an old one. (Today)