Need a freebie for Facebook Page

Building a Facebook Page and need something interesting and free to offer to visitors if they click "Like" - to reward them.

I already have these: Free Updates & Stay connected kinda (obviously) and a free Internet Marketing course.

But feel like having 3 freebies total will be even more effective.
I'm not good at creating eBooks yet (planning to learn later on, have a course in mind already) so need something I can share.

Any ideas? I'd appreciate a little bit of your imagination :D