How can mindfulness/awareness be employed effectively for Forgiveness?

I don't want to harbor ill-will anymore and I want to forgive others for what they did to me and also forgive myself for my past actions. So I remain aware and mindful of the thoughts of ill-will that pop up and mindful of corresponding feelings. But this does not seem to alleviate the stream of thoughts and feelings all day. How can mindfulness be employed effectively for forgiveness?