P2P lending and cloud mining are the first things that come to my mind. Lending can be risky, so you need to be sure of who you're lending to. It's definitely safer than gambling though..
Have you tried btcjam? Or another website? I have long wanted to try P2P Lending. I have been registered there, but never lent someone money.
I would have invested already, but I keep reading how there is a lot of people complaining about people not paying back the loans, let alone the interest, and BTCjam does nothing about it..
yeah, lending bitcoin to people is a lot of work, especially lending on BTC-jam. a lot of scammers there, who are taking small loans to build up some ratings and then scam people by taking a bigger loan and run away with it.
if you want to lend bitcoin do it here, but there are a lot of others currently doing it.