Not all search engines support the Robots META tag. Until the tag is more widely supported, you may have to restrict indexing of your site by another means. 6.3.3.4 Optional META Tags Additional META tags that provide more information about a web site can be added as necessary. An industry consortium called the Dublin Core Metadata Initiative has developed a 15-element metadata set to facilitate the discovery of electronic resources by digital libraries, researchers, other agencies or specialized communities. Some search engines will alphabetize their lists.
Numbers are also good.
Sometimes numbers are indexed before alphabetical listings. 6.3.4.1.2 Using the most-searched words Be aware of what words are searched most often and try to include some of them as keywords. One trick of the trade is to use the same term repeatedly. However this trick can undermine your search goals. Cramming a page with the same search term.