Search engines are just the results of a database search for the keywords entered into the search description. The real process starts long before the search takes place. To implement a strategy not only for site registration but to create visibility based on relevancy and keyword correlations you need to understand how search engines work. There are 100's of web sites with information about search engines. Here a just a few resources that will keep you busy with information from how search engines work to Auto submission services.
Northern webs has a search engine tutorial with lots of resources and tools.
Some search engines take the first 200 characters of the index page and output the results with the url for linking to the site. This is considered a gateway to your business site. One of two things will happen you will either be ignored, because some search robots do not catalog graphics for the first 200 characters. AIME has been researching these methods for the past 4 years and testing what works and what doesn't. The major considerations here are what is the image you want to present.