Unless the "crazy" is caused by drug or alcohol use, you can't "stop" it. If it is caused by one or both of those, STOP. Otherwise, you can see a therapist to talk through your issues, learn healthy coping mechanisms, and if the therapist thinks it's necessary and/or would be beneficial, he/she can refer you to psychiatrist who'll prescribe the appropriate medications for your particular psych. condition. There are many therapeutic approaches & psych meds these days that can help manage & control "crazy" very well.