what helped you get past cheating?

Three days ago, my husband admitted to me that he cheated on me once two years ago. He says it has never happened before or since (we have been together almost four years). Maybe I'm naive, but I believe him. We have two children together (our oldest was six months when he cheated), so maybe that's why I want to believe him.

But I can't shake the anger that I feel and how disgusted I feel at him, myself, and our marriage. I know it's only been three days, but what are steps to take to work on our marriage and heal the emotional pain of this? He's very repentive, sorry, and has cried about it. I do feel that he's genuine in those feelings. But I don't know. I know our relationship might end either way after this, but I just want to try to work things out first but I'm so lost on what to do and what to try.