All habits can be divided into 2 categories - harmful and useful. The former, unlike the latter, usually do not lead to anything good. Different habits are dealt with in different ways. But the general principles will be useful to everyone in need.
Instructions
Step 1
You can only defeat a habit by understanding its cause. Watch yourself from the outside, find an "irritant" or other reason. If from a conversation with your mother-in-law you start biting your lip or scratching your intimate parts - everything is clear. Try to contact less with the "irritant".
Step 2
Note that a habit becomes such if it gives you some kind of pleasure, increases the emotional background. Find what you like about your bad habit and reflect on how important the habit is to you. Maybe it doesn't bring the desired effect at all.
Step 3
Make a firm decision. Find the positives in breaking the habit. But if this does not help, you can do otherwise. Play in your brain what happens if you break the promise you made to yourself. Or you can bet on a substantial amount of money. Perhaps the fear of a family breakdown or the fear of losing a lot of money will outweigh the desire to continue smoking or drinking (for example).
Step 4
Try to develop a new habit. And do it so that the new one replaces the old one and brings the same pleasure. Let's say you have a habit that affects all pens and pencils that fall into your hands. You love to chew on them. Replace this addiction by drawing small pictures on a piece of paper. And smoke breaks during work can be changed to drinking coffee or tea.
Step 5
Self-control is considered one of the most difficult approaches to a bad habit, but sometimes it is the only way to get rid of the habit that torments you. Consider a specific example: you often use words-parasites in speech, sitting behind a chair, dangling your legs, fiddling with the edge of your blouse or jacket. When preparing for small talk, think over everything to the smallest detail, right down to how you sit at the chair. Before speaking in public - also learn your speech so that you can say everything without hesitation, which provokes the use of harmful words.