Word of Mouth Marketing
Get clients to spread your name. There’s nothing like a satisfied customer spreading good news about your business.
For every client who refers a new one, offer both a free PC cleaning. (Dust collection inside computers can actually cause system failures. A laptop I examined was rebooting after only a minute; it turned out to have a clump of dust stopping the fan.) To help your customers remember, hand them two free-pc cleaning coupons, each redeemable on a referral. They will serve as reminders.
Provide coupons to your customers, good for one month or less. While they probably won’t use them in a month, the limited validity will motivate them to refer you to their friends before the coupons go to waste.
Ask for their email address on your sign-off forms. Right next to their signature, include a line that requests (optional) their email address. Use it with care, of course. Try emailing your clients once every couple months with a valuable discount on a tuneup and security check. This will remind them of your existence, and they will think of you when their friends mention a computer problem.