Hey Steve, I have to first say this to you, no physical force of any kind, ever.
Now, the most important thing, besides taking care of your children, is to take care of yourself. Eat well, rest, exercise, meditate and pray (if you are so inclined)
Read the book and the resources.
Do not put any pressure on your wife, no begging, no yelling, no threats.
Begin the long process of trying to detach from her actions.
Do not have relationship talks with her. Act as if you are moving forward in your life, then actually start to do it.
Moving forward does not mean throw her out or file for divorce unless that is what you want.
Come here and post when you are angry or confused. The weekends tend to be quiet. Keep posting, someone will reply. Also, read others' threads and post to them so people get to know you.