I have setup a sub Domain in my home Business resources site called Freebooks.

In the sub domain the visitors can get access to 5 famous books:
1. Think & Grow Rich by Napoleon Hill
2. Science Of Getting Rich by Wallace Wattles
3. As A Man Thinketh by James Allen
4. Acres Of Diamonds by Russell Conwell
5. The Art And Science Of Personal Magnetism by Theron Q. Dumont

The visitors will get the books access for free by subscribing to my new series of
home business newsletter that will deliver usefull articles weekly.

Another great way to build list of loyal subscribers.

So the lesson here is to build your list for a long term business strategy.