How do you get your site in the search engines?
Firstly make sure you submit your site to them all. A great website is useless unless Google et al know you are there and ready to do business.
Usability
Create XML sitemaps and make sure you submit it to the search engines. Offer an HTML site map which is auto updated based on the XML site map. Plus, make sure you don’t have more than three levels of navigation on your site – the more levels, the more difficult information becomes to find, and so crawlers struggle to index these pages.
GoogleBot is made up of several algorithms, DeepBot and FreshBot being the most obvious, FreshBot visits ranked pages regularly DeepBot less so.
By submitting your XML sitemap to Google Webmaster Tools you can see how many pages on your site Google is indexing.
An Introduction to SEO
Next – Conclusion

Good read, thanks. Seo is important.