When my wife moved out I realized I could clean, and improve, the house and lawn my way without constantly getting permission and approval. It's been wonderful!
As I come across stuff that belongs to my wife, I'll save it and then when she comes over to get the boys (we do the 50-50 thing with the boys) I'll tell her to take her stuff or I'll throw it away. It's not an attempt to be mean, but I am actively showing her that I'm moving on without her.