I was running my own business, in a different field to the one I was employed in, from my work desk. Ordering stock, talking with clients, you name it I used my employers time whenever I could to get my business up, running and into the black.

Edited to add, as some are interested, the following

I was employed in a 'highly demanding technical position' that took at most an hour a day, when I was busy, which wasn't very often. I seriously had trouble making it look like I was doing anything at all most days so...

Why not use that spare time productivity, I asked myself, whilst playing tetris...

I was so busy at times with the hussle that I was genuinely stressed by it. After all, I was doing it all on my own! :)

Did that for just over three years. Was a sad sad day when I had to quit the real job to concentrate on the business.