Useful links for your reference:

“Who do you say that I am?” an online tract from Grace to You – excellent message

Am I Really a Christian? – series of well-done short video messages

Wasted Faith book – is your faith real? is it a faith that saves? or might you have a false assurance of salvation?

Questions?  – here are some really good questions (and answers!) that you may have about God, Christ, the Bible, or the Christian faith

Here is an interesting and fairly short tract called “How would you feel if your thought life were to be shown on Nationwide TV?

The Way of the Master – excellent resources

After Life Catalog – the gospel

I’ll Be – (will you?) – yes, really