Search engine optimization is a process, one that must always be revisited and adapted as search algorithms are changed by the search engines. Because SEO is a constant process, it is often pushed to the bottom of the "to do list" of marketers. Be that as it may, resolve not to ignore search engine optimization as it cycles its way through your task list. Give search engine optimization the attention that it deserves.
There are few things that you can do that will result in virtually "free" traffic, and therefore SEO deserves both time and attention.