Probably the question I most get asked is
"WHY CAN'T I FIND MY SITE ON GOOGLE"
or
"HOW CAN I GET MORE TRAFFIC"
This is probably the hardest area to understand when constructing a site here are a few basics and useful links

Do not expect your site to appear on the search engines "instantly"
They are good but but not that good.
The web is very very big with thousands of new sites being created every day ! Setting meta tags for description helps as does a descriptive title.
Also you can try adding your site manually
Google addurl
Yahoo submit info
Bing submit site

Google Yahoo and Bing all CLAIM that but anything that could help should be used so add it anyway
They should be concise and relevant to the content of the page
You can set title , keywords and description for any html page from the page options in the building tool
Search engines should (no guarantees) use the description and title when they finally list your site.

Google
Yahoo
Bing
There are a whole load more meta tags you can add to your pages
NONE OF THESE TAGS WILL IMPROVE PAGE RANK
Although some serve other special purposes
Sometimes you will NOT want search engines to list a page. For this use a special meta tag
(again there is no guarantee)
<meta name="robots" content="noindex , nofollow" />

Join every good and genuine one that you can find
Join Mobpartner
and see their auto submit tool and Banners Exchange tool
Check out igloo.mobi

Post your url on as many as you can but don't be surprised or upset if the moderators delete your posts
promote your site on as many social networks as you can find
create facebook and twitter pages and add their buttons and widgets to your site

It is very important to understand that content is a priority in any site.
If you put in enough hard work to provide your users with quality original content, your site will eventually attract attention and become popular.
Try to keep your page code valid and free from errors.
search engine bots do not like errors or invalid code
you can use online services to check your html see
W3C validator services
Onlinewebcheck.com

The images on your site are another tool in improving your visibility. give them proper names and alt texts that actually mean something.
for example "little_fluffy_bunny.jpg" means a lot more to a search engine than "lfb001.jpg"

This is the same code as produced by the site search widget with the addition of a check box for search within a domain
<form method="get" action="http://www.google.com/search"><input type="text" name="q" maxlength="255" value="" /><br /><input type="submit" value="Search" /><input type="checkbox" name="sitesearch" value='<xt:url type="domain" />' checked="checked"/>This site<br /></form>