Most search engines have a link whereby you can submit your url for addition to their list of sites to be spidered. Googles is at :
http://www.google.com/addurl/?continue=/addurl
Or you could use a service which automatically submits your url to many sites at once, two that i've used in the past being :
http://www.submitexpress.com/list.html
http://www.addpro.com/submit30.htm