One of the things I really like about Linux on my Raspberry Pi (and, presumably, most or all variants of Linux on other platforms) is that it autocompletes filenames and parameters on the command line for you when you press tab, providing you've typed enough of the filename or parameter to make it unique.
I found myself wishing that Windows did this on the command line as well.
Sometime later, I forgot that I was on a Windows command line, and pressed tab to autocomplete a filename ... and it worked.
I was astounded.
I imagined this was a fairly new feature (I was on Windows 7 at the time), so went to a Windows XP box and... it works there too!
How did I overlook this incredibly useful feature for so long?
I am an idiot.
Ian