Make your site easily accessible
Build your site with a logical link structure. Every page should be reachable from at least one static text link.
Use a text browser, such as Lynx, to examine your site. Most spiders see your site much as Lynx would. If features such as JavaScript, cookies, session IDs, frames, DHTML, or Macromedia Flash keep you from seeing your entire site in a text browser, then spiders may have trouble crawling it.