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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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