Adsense. With only about 10k hits a day, my bedtime
calculator http://sleepyti.me brings in $10-$20/day. At the rate you're getting users, you could probably bring in a significant load of cash. Good luck!
Thanks for the tip. I saw that article on HN the other day, but the wording is designed to encourage people to leave adblock disabled to see relevant, sleep-related ads. You might be right though, it's always better safe than sorry; I'll look into clarifying the wording there. Wouldn't want to offend my Google overlords!
Facebook and Twitter help spread the message to new users, as well as a nice daily referral from StumbleUpon.
A few people have posted my URL to social news sites like Reddit and Digg, but even when those gain traction it's usually just a few thousand and quite short-lived.
Hey Shaw, it sounds interesting. Can u guide me about how u started this project and contacted Adsense. I wanna start one like this and make some earning.