Search engines don’t respond to changes overnight. In fact, it might take a month or more to see the results of your efforts reflected in search engine results. Don’t give up hope — keep including keywords in new content, and asking other organizations to link to your resources.
Once you do see some results, don’t rest on your laurels. The Web is a dynamic place, and new Web sites, new articles, and changing search engine priorities can affect your placement. Check in on the search results for your keywords at least every month or so, to help maintain your position and continue to enhance your strategy.