If you want to revoke your will, you can accomplish this objective in several ways. Wills are governed by state law, which may vary somewhat from one state to another, so you should familiarize yourself with the relevant laws of the state in which you reside. Generally, you just need to manifest your intent to revoke the will for a court to consider it revoked.
Draft and execute a new will that disposes of your entire estate. If you've drafted previous wills, the most recent one takes precedence and all earlier wills are null and void. The law views your act of creating a new will as intent to revoke the old will.
Destroy the will that you wish to revoke. Tear it up, shred it, burn it or just "X" out every page. Destruction of the original will shows your intent to revoke it.
File for divorce or have your marriage annulled. In most states, a divorce or annulment automatically revokes provisions of a will that favor a former spouse; however, other provisions in the will remain valid and enforceable.