With a blank piece of paper before you, ask God to bring to mind anyone you need to forgive. If he gives you a name or two or ten, start praying for those on your list. Pray every day until you feel God melt that resentment you've been holding onto.

I have found it is impossible to be unforgiving toward those I am praying for. It’s not easy to start praying for them; it’s one of the hardest things I’ve done. But when I make that person an object of prayer, I open the door of my heart a little wider so that God can come in and breathe on my hardened heart, melting the icy resentment that is there.