A simple way to attract lifetime customers would be to give people a freebie. The freebie should be related to other products or services you sell. You may not be getting paid for freebie, but you will get a lot more people using one of your products because it is free. If they are impressed by your free product there is a high chance they'll buy your other products in future.

The last way is to sell your product at price it costs you to produce or buy it. You will usually sell more products at a lower price than your competition which equals more potential lifetime customers. You will break even in cost but you'll make your profit from upsell and backend products your sell your lifetime customers.

6. Test "bill me later option" on your web site. Most people are honest and will pay you. It is a powerful little niche and could increase your sales.

7. Find a charity your target audience would likely support. Tell people on your ad copy that you will give a percentage of profits to that charity.

8. Hold a "buy most wins contest" on your web site. Tell people each monthly winner will get their entire purchase refunded.

9. Attract visitors to your web site by offering them a free course. You could package course on a follow-up autoresponder and send lessons daily.

10. Interview people related to your industry and get their legal permission to convert it to an article. Promote your web site by submitting it to ezines.