How to scold oneself?

Sometimes you do things you 100% you will regret later. Some things you do know are bad but you proceed doing them. How can i scold myself. Like a wake up call? Everytime i say i'm not going to do it again, but i actually do it over and over. I procrastinate when i have a lot of things to be done but i continue. What is the solution?
How to scold oneself?
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