I usually begin to write my classes and factoring some of them out, creating stubs,etc, all in the same file. Later I need to sort all that stuff and I begin to use the Move... refactor of Rsharper An finally the Move... action open the new file and make it active and there is another time loss comming back to the original file, maybe a checkbox "Open the new file" (that also remembers his state) would be GREAT !!!