Selected answers from the Dumb SEO Questions G+ community.
Michael Martinez: I generally advise people to focus on the most important products first. Work your way down the list in terms of what your priorities are. Underperforming products may be underperforming because they lack attention but you have to organize your time. You cannot get to everything at once. It generally harms nothing to leave everything in place until you can get to it. If you don`t have a site search tool, you should implement one. Visitors often use them when landing on large content sites.