Extending forgiveness as issues arise is one way to prevent karma from building up. It’s the principle of “pay as you go.” If there is someone you haven’t forgiven or who hasn’t forgiven you, talk to her or write a letter. Ask for her forgiveness and tell her that you forgive her. If the person has passed on, you can express your feelings in a written letter, burn it and ask the angels to deliver your letter to that soul.
You can also practice the art of forgiveness by creating your own surrender ritual, which you can give at the end of each day before going to sleep.