You can also pay to have an organisation do the submission on your behalf. Sites mentioned here are not recommendations but are examples for your information. There would be many more such sites on the web. Include your URL on everything Places where you should have your URL include the signature line of your emails, on any stationery that you have, eg. Tell people about it Make sure that you tell anyone who will listen about your web site and give them the address.
Word of mouth can be very valuable.
Mailouts Create a mailing list of your customers, colleagues etc. or use an existing one if you have it, to announce the establishment of your site. You could ask your existing customers for recommendations of who else to include in the mailout. This is should be used carefully as some people may consider it spam. Links Request links to your site from other sites. Choose sites that would have similar interests and therefore similar visitors.