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

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

9. Sell gift certificates for your products. You'll make sales from purchase of gift certificate, when 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, ballcaps, t-shirts etc. This will allow other people to see and order.

Demographic Surveys - what's your gender, age, income, occupation, marital status, etc.

Sometimes people don't want to take time to fill out a survey. To encourage them to fill out survey offer them a freebie if they fill it out. Some ideas are free ebooks, free advertising, free reports, free internet services or a free e-zine. Hold a free online contest or sweepstakes and ask visitors to fill out a survey before they enter.

If you don't yet have an e-mail address list you could post your survey on appropriate newsgroups, forums and e-mail discussion lists. You could also upload survey software to your web site or use a free survey service on internet. To find such services just type in keyword "survey" in your search engine of choice.