] The simplest and surest method of ensuring your documents
] are indexed correctly is to ensure your pages have good,
] accessible, and well-structured content...Techniques to
] trick search engines into ranking your content higher are
] unlikely to work, and could ultimately result in a ban.
] The accessible solution is not only better for your
] visitors, but also ensures you get plenty of them.

#1 Search Engine Optimisation Blog - Accessible Search Engine Optimisation Techniques