How to prevent doing the same mistakes over and over again?

At the moment I am preparing for the GMAT. However, a phenomenon that occured and has occured in the past is that sometimes I always make the same mistakes at similar problems, especially when doing GMAT problems or collegue homework problems. How do YOU prevent yourself from the phenomenon?

PS.: I would be thankful, if you do not immediately close my open question

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Have you fully understood why your answers to the questions you keep getting wrong are wrong? –  Tara B Feb 27 at 16:31

Practice, practice, practice! :)