1. When you make your first sale, follow-up with the customer. You could follow-up with a "thank you" email and include an advertisement for other products you sell. You could follow-up every few months.

Make sure you don't overflow them with ads too... you want to keep them hyper-responsive to your promotions.

2. You could upsell to your customers. When they're at your order page, tell them about a few extra related products you have for sale. They could just add it to their original order.

One-time offers are a quick powerful way to increase your online profits. Don't miss out!

3. Tell your customers if they refer four customers to your web site, they will receive a full rebate of their purchase price. This will turn one sale into three sales.

This is a powerful form of viral marketing and once it takes it's effect you can just sit back and watch your profits just roll in by the truckloads.

4. When you sell a product, give your customers the option of joining an affiliate program so they can make commissions selling your product. This will multiply the sale you just made.

You would usually put this information on the thank-you or delivery page to see best results.

5. Sell the reprint/reproduction rights to your products.

You could include an ad on or with the product for other products you sell. You could make sales for the reproduction rights and sales on the back end product.

This is also another great form of viral marketing and branding as well... you don't have to do any of the work they will do it all for you.

6. You could cross promote your product with other businesses' products in a package deal. You can include an ad or flyer for other products you sell and have other businesses selling for you.

They will be more than happy to offer more great value to their subscribers.

7. When you ship out or deliver your product, include a coupon for other related products you sell in the package. This will attract them to buy more products from you.

8. Send your customers a catalog of add-on products for the original product they purchased. This could be upgrades, special services, attachments, etc. If they enjoy your product they will buy the extra add-ons.

9. Sell gift certificates for your products. You'll make sales from the purchase of the gift certificate, when the recipient cashes it in. They could also buy other items from your web site.

10. Send your customers free products with their product package. The freebies should have your ad printed on them. It could be bumper stickers, ball caps, t-shirts etc. This will allow other people to see your ad and order.

You can apply any of these 10 killer tips and see an increase online sales.