Do you surf the web? A lot?
Does your browser have tabs (Goggle Chrome, Firefox)?
Open another tabs and load this site:

http://moonbit.co.in/?ref=5596b18f2945

Enter your Bitcoin address, and every 6-15 minutes, or every time you are waiting on other web pages to load, or when you are done reading the current page, switch to this tab, and claim a few Satoshi (small fractions of a Bitcoin).

It doesn't require much effort on your part, and you are already browsing the web or reading your favorite blog, checking Facebook or Pinterest. You might as well get paid to do it.

Just try it out. :-)