OK, the idea I'm about to expand about generating almost instant cash-flow is a little far fetched and risky but... I have repeatedly in the past generated instant cash by exploiting my extensive knowledge in online sports betting.
Actually, I periodically bet nowadays because I've trained my "gut system" to picking up winners, mostly in sports like Basketball, Rugby and Boxing. I earn a few thousands a year just by picking-up my casual "hot picks" pairs in sports arbitrage.
My strategy was to get hooked on TV, undistracted, totally hooked in the games and routinely bid against the odds - that's the insider concept - or else it's not worth the risk.