Unlike Kate Gregory, the only shortcut that was new to me was Alt-DoubleClick. It isn’t a keyboard shortcut, so it is far less valuable to me.
I use Alt-Space all the time. I highly recommend it. I hope that Kate masters it usage.
My most recent “windows” keyboard shortcut which I have mastered is use of Ctrl-Alt-Break to restore and full screen an MSTSC(RDP) session. I can Alt-tab in a remote desktop session, and then Ctrl-Alt-Break and Alt-tab my desktop and then Alt-tab back to my remote desktop and then Ctrl-Alt-Break to full screen the remote desktop and continue Alt-tab in the remote session. It took my a while to master working this way, but being able to move between these things quickly without touching a mouse is absolutely brilliant!
Now if only Hit-a-Hint worked just a little better.
What is inadequate about hit-a-hint? It seems to work just great with a little tweaking. One issue I have noticed is that on linux, blur focus from text field by holding down magic key does not work. Under windows it works just fine. No problem since you can assign a key to blur focus. It just can’t be the same as magic key.