On your free email reminders to customers, tell them of your company specials, markdowns, discounted items. Place this note about company product or service specials on the bottom of all of your employees’ outgoing emails (hundreds or thousands of emails each day) as part of their signature and contact information. Advertise on your mailers with different stickers every week or month. The best part of this idea is to add this advertisement to emails going out every day to hundreds or thousands of different but interested parties at no additional postage cost.