Answer:
You can become a resident (160 gems a month and ourworld privileges, but of coarse that's not free, so you can:
*Get the ourworld toolbar = 10 gems a week.
*Get the monthly news letter (done through email can be set in ourworld settings) = 10 gems a month.
*Watch ads from links at ourworld.com = 1-8 gems per video.
*Complete the challenges emailed to you through your ourworld email.
*Go to ourworld-guide.com for the weekly gem codes, monthly gem codes, and facebook offers.