• Put your website address on every piece of Email or Postal Mail your business sends out.
• Always include it on business cards, menus, price lists, printed advertisements and brochures.
• Have a magnetic sign made for your car. Prices start at under $20.
• A great resource for free business cards, magnetic signs and other printed marketing material is Vista Print. Save up to 90% + get FREE Shipping with this link.
• Email Marketing and Online Surveys by Constant Contact make it easy to connect with your customers. Try it FREE for 60-Days.
  Encourage customers to forward the messages to their friends.
• Get well-made,Custom-embroidered logo shirts and apparel by Queensboro at very low prices.

Do you have a partnership with a large company? Ask if they will provide a link to your site on their site. Have you found a great related but non-competing site on-line? Ask them about exchanging links.
More Marketing Suggestions:
Yahoo! Sponsored Search connects businesses and customers online. Sign up and get a $25 credit.