"Two ways to live" is my favorite tract-like approach to sharing the gospel. Notice that it basically follows the course of redemptive history, rather than being a topical approach to the gospel. I think that this tract helps paves the way to a basic grasp of the flow of the Bible. Remember also, the gospel you convert them with is the gospel you convert them to. Convert them with a gospel of theotainment and they will be dependent on a theotainment ministry. But convert them with the gospel of grace through repentance/faith and they will be converted to biblical Christianity.
Here is the online version of Two Ways to Live: http://www.matthiasmedia.com.au/2wtl/