Yes, there are several techniques and practices that can help you stop manifesting what you don't want. These include gaining awareness of your beliefs and actions, reprogramming your belief system, taking positive actions, redirecting your thoughts, and using visualization techniques. By becoming aware of the beliefs and actions that are creating what you don't want, healing your belief system, and taking control of your thoughts and actions, you can shift your focus towards manifesting what you do want and create a more positive and fulfilling future.