I violated one of "my rules" while doing some stuff, and I made a HUGE mistake!

A bit of background....
I am getting ready to go on an "extended trip" for my job. What that means is I'll be away from my home network for a while, and was setting some stuff to "make my life easier" while I was away.
On my server, I run Linux, and I was in the process of building a "special" operating system that I planned to use while I was gone. I spent two days downloading, compiling and installing several programs that I really wanted to make work. Usually after doing extensive work, I'll save it, tar it up and put it in a separate place to "take care" of it. This time I didn't move my work to a separate place, and I did the ultimate.
Just for anyone's information, if you enter the command AS ROOT
rm -rdf somefile* it WILL remove the file and any directory named like it!

Needless to say, I am downloading some sources as I type this. This is a fundamental thing that is taught early. I thought that I "knew enough about what I was doing" to get careless on the keyboard, and now I am paying the price.

I just wanted to post this as a part rant and part warning.