Sometimes you just have to repeat a desired behaviour for atleast 2 months before it turns out to a habit, and this is not affected by missing a day or two occasionally as long as you resume to the behaviour as soon as possible. I hope this informative episode will open your eyes and let you see that any habit either negative or positive can be built gradually with time, but I really pray that you use it to abolish negative and un-useful behaviours that you are struggling with and fuel the positive ones that you wish to see in you life. Enjoy!!