I once had a colleague who worked two jobs. At the end of every month, he would come to me – flaunting some cash in his hands – and say, “Hey, still think double shifts are too stressful?” Then I’d say, “Yes, Billy, it’s back-breaking.” The funny guy would then whistle away. Call me lazy, but I belong to the school of thought that Smart Work trumps Hard Work all day long. So I devised my own plan to add another income stream to my salary. Took me a couple of days to figure it out, but at last, I…