How does one get rid of shame and guilt?

While walking today, in my stream of consciousness an memory of a insignificant business failure from over a decade ago flashed through my mind. At its base was shame.

I practice a lot of positive affirmations and such to clear my mind of needless shame and guilt. I’ve done it for years, and it works for me.

I also practice mindfulness as the Buddhists teach it. I try as much as possible to stay in the present moment neither fretting over the past nor worrying about the future. I’m not always successful, but this practice brings me serenity.

What have you done to eliminate shame and guilt?