Unfortunately, unless you have only a few pages on your site, you can't do this all at once. You'll need to spread your submissions out over days or even weeks, or risk being considered a spammer by the engines. Once you've got your site listed in the search engines, the really hard work begins. You need to actively promote your site. One of the best ways to do this is to send email to sites similar to yours and request that they link to you.
People trust links.
When someone creates a link to a site it's almost a recommendation to go check the site out. The search engines recognize this, and boost popular sites in result lists. Popularity is calculated by measuring the number of sites linking to a site. There are many other things you can do to promote your site. A huge, newly discovered hole in Web security makes Web browsers vulnerable to stealth attacks from malicious code.