Find pro-marriage friends, wherever you can. Again, church is a good place to start. I can recoomend a few good ones in the Bay Area.
Wear your ring. You are still married.
Will dating really help your DB efforts? Your marriage isn't over yet. The temptation to receive love and affirmation from another man will be strong right now. Someone on this board made a promise to herself that she wouldn't date until the divorce was final. That's sound advice to me.