Openly and honestly confess all your sins. Then you can claim His promise that you are forgiven and cleansed. Believe it and start walking in victory. If your sinning has harmed someone else, you should confess to that individual and make restitution if you can. The Bible tells us that there is a sin principle in our lives which keeps producing the individual sins.
Self is the brewery of sins.
This brewery must be dealt with also if there is to be victory. It is not that you have to crucify old self. You must realize that the crucifixion has already taken place. To have victory you must get so sick of self that you are willing to commit self to the grave. It is then that you have the living Christ as your own life.