Lottery is another good method. When a person buys a lottery ticket, he fills his address on the ticket. This information can be used to contact the customer in future. In the above practices it’s very vital to not to advertise in the first step. Only after getting the customer contact information, should promotional mails be mailed to him. Long advertisements that are featured in the newspaper are a small twist to this trick. If the customer invests time to read the whole advertisement, he has committed and will surely respond to the ad.