I have started my new job and within the move from State College to Austin, I am also finding myself having to relearn what I once knew in Windows. What is surprisings is how difficult it is to get away from things like key bindings and small workflow issues that I had in GNOME that I don't have in Windows. A very obvious one being virtual workspaces.
I tried a few tools such as the powertoys from microsoft but it was slow and didn't have a way to set the key bindings to something like in Metacity. What I did find was Virtual Dimension, a virtual workspace manager for Windows that is pretty awesome. It stays out of my way and allows for keybindings like I had in Metacity. The best aspect is that it is fast, unlike the windows powertoy.
My other big hurdle has been life without Emacs. I have tried to run Emacs in Windows and while it is possible, it is just not preferable at the moment. My resolve has been to settle on Eclipse. It has Emacs key bindings, also runs on Linux and has great plugins for Python (PyDev) and XML/XSL (Oxygen). The CVS and general organizational tools are also proving to be useful as well. With that said, I still may go ahead and try my hands at Vi.