Send customers a free surprise gift

Send customers a free surprise gift after they order your first product.

You could attach another ad with the free gift for your back-end product. For example, "Unadvertised Surprise Bonus! A free copywriting e-book!" Then inside the e-book have subtle ads for the product(s) you're selling.

Above or below each page. You could also mention them within your content.

Start a referral program

Instead of starting an affiliate program, start a referral program.

Give people discounts and free products for referring people to your site. For example, you could say, "Get a free e-book software for referring just 3 people to our web site."

Another example, "Refer just 2 people to our web site to get a 20% discount on our new e-book!"