Motivate fans to invite their friends to our fan page?
For now, I don't want to continue spending in facebook ads. I want to find ways (either by contests, raffles, surveys, or any other possible way) of motivating our fans to invite their friends to our fanpage (maybe they can post on their wall something about our fanpage?).
My question is: regardless of what our site offers, what can I do so that a fan has a reason to invite his/her friend to our fanpage?
For example, at one point I was thinking of giving away an ipad for this purpose. But how could I use this giveaway in order to convince our current fans to invite their friends?
Or maybe I don't need to spend so much on an item in order to accomplish this... but I don't know what else to do.
Any suggestions will be greatly appreciated.
Thanks.
Publish Coloring Books for Profit (WSOTD 7-30-2015)