Some practical advice that helped me...
1. Get a PO box so you can control where your mail goes.
2. Get a storage unit where you can keep some basic household stuff to set up if you do decide to leave.
3. Get some cash together that she doesn't know about. That way you can rent an apartment if the time comes.
4. Don't get a girlfriend, she will find out and she'll use it to crucify you.
5. You're paying your attorney by the hour. When he talks to his friends / colleagues about your case he says "I've got a $200,000 case" etc. There's no incentive for an attorney to settle this quickly. The way it often happens is months of back and forth, and then the morning before it goes to court the attorneys get together for an hour and work it all out! You've got to wonder why they didn't do that six months and fifty thousand dollars ago.

Always put the kids first and do everything you can to let them know that you're leaving her and not them. Harder than you'd think.

Good luck!