The most important part of SEO is making sure your site has unique and fresh content. If the content on your site does not appear elsewhere on the web, the search engines will weigh it more highly than copied content. On the same token, newer content is weighted more highly than aging content.
Give each page its own title tag. This way, search engines won't think every page is the same and fail to index it properly. Not to mention that it becomes easier for the reader to tell the differences between the pages as well. Something as simple as titling your individual pages can push up your ranking in the SERPs.
To encourage searchers to click on your site, make sure that you choose a relevant meta tag for every page of your website. The meta tag is the brief description that appears under your title on the search engine results page, and without it, people may not know what your site is about.
Start from the top. You likely will not be able to tackle your entire website for optimization in a week, let alone a day. Begin by working with your top ranked pages, and move down from there. The most popular pages will be the ones to bring you the most hits from optimization anyway, but optimizing them all will bring your site ranking upwards as a whole.
You should always write good meta description tags for each of your pages. Description tags provide good value, because Google uses them to create short blurbs that are displayed under a page's title on its search engine results pages. A very good description can be beneficial to you, as it may help lure visitors to your site instead of the competitions.
Keep your website up to date and don't neglect it. Visitors love fresh content. They won't have a reason to come back to your site if there is nothing new to view. Try to stay relevant and update your site at least weekly. More visitor clicks equates to higher rankings and more visibility on search engines.
Do not expect to optimize your website once and be done with it. Expect to spend time each day working with search engine information. This is not a one step process and should not be looked at as such. Keep researching new methods and implementing them. Your visitors will appreciate the time and attention.
Do not use trademarked terms and product names in your meta tags unless you have an arrangement to do so with the owners of the trademark. Trademark owners are fiercely protective of their valuable property online. They will not appreciate it if you use their terms to drive up your website's search index ranking.
If you want to get rankings up, you should know that these are good suggestions to go forward with. Everyone wants their site to rank as high as possible in searches, and this can become possible with proper use of good SEO tactics, which are simple to learn.