Learn to Be an Online Missionary

Ask a question on your facebook page about your calling. Your member friends will sure to comment. The more comments you get the longer your post will stay in people's newsfeeds. Try to add a link to what your calling is about or what you will be teaching. Maybe non-members will offer advice and in the process they may look over the link you sent.

People will learn a lot about our church when they see the service you give and what is being taught. This is a very non-preachy way to share the gospel with your friends.