I lock it when I go away as well. And, of course, I always have to bring this up when this topic comes up. But, I use a tiny piece of code and put it in a shortcut, which allows you to lock the desktop with one key instead of one. Now, while that sounds trivial at least for me it is not.
When the visit is over, and I have signed my note, I pick up my clipboard and Superbill. I then can't click on both Windows key + L. So one key is easier.
Of course, I could try to remember to press Windows Key + L before I pick up the clipboard, but I forget too often. So, if anyone wants to make a shortcut, let me know. While the shortcut is on the desktop, you can set it easily to be a function key.
