Get fine-print savvy. Some websites will say you won an Xbox360 or a new laptop, for example, but if you look carefully, you’ll usually find an asterisk near the "you won" part. Be especially wary of weasel words, like "you may have already won," or "new laptop is based on a purchase of gummy bears worth $5,000 or more." Don't fall into these sorts of traps; they're ridiculously difficult and not worth it.
Swagbucks makes a tangible amount of money with the mobile apps included. I've cashed out my points for two 10 dollar visa gift cards which I got over a span of two weeks without the mobile apps but it's kind of slowed down since I keep getting disqualified from surveys. You should make about 80 cents a day with just the apps alone (minimal babysitting) so that'll be an extra 20 to 30 a month, maybe even more.
There are no end of ways to make money online that are fast, easy, and passive. In fact, there are so many, I’ve written several blog posts about the topic, and will be writing a lot more in the future. I’d suggest you check out my articles on the topic about apps and 15 other ways to earn online, however I’ll give you a short version here on Quora.
Research other listings in your city on AirBnB and see what the going rate is for a place like yours. You could also just rent out a private room as well or even a bed in a shared room. In fact, that's how AirBnB got its start. However, you might find it hard in the beginning without reviews, but as long as you take really good care of your guests and provide a lot of value, the reviews will eventually come rolling in.