Psalm 51:13 Then will I teach transgressors thy ways; and sinners shall be converted unto thee.
Throughout psalm 51 David asks to be cleansed from his sin, then he tells God what he would do, after receiving forgiveness.
If you have sincerely prayed for forgiveness, God will grant it to you. After you receive the joy of his salvation, then what will you do? If you received the forgiveness of your sins a long time ago, then maybe it's time to start telling others how to do it.
Please come out here into this woefully ignorant world and help us teach them God's ways. That transgressors may learn, and that sinners may be converted unto him, before it's too late.