***EDIT: After re-reading, this sounds like I'm mister-know-it-all. Not meant that way at all (although I've been told I can come accross that way). By no means do I know everything, in fact, there is still much to learn, and I would venture to say that overall I know very little. I just try and learn when I can. Normal reading can now be continued.***
I've accumulated quite a bit of Excel know-how over the last 6 years. I never thought much about it, and really still don't as there is always something to learn.
But, yesterday, as I was teaching an Excel class here in the office, I realized how much I take some of that knowledge for granted. I find it amazing how people can use a tool for years and not know some of the most basic things (like how to remove cell coloring, or borders - of course they know how to color or border, just not remove).
The class went well overall, but I ended up covering half of what I thought we were going to cover as some time was needed to explain things that I assumed people already knew. It was a good reality check for me.