Like what sanjayyadav said you need to optimize each page. I took a look at your site and clicked on a few movie titles you need to write a lot for than a sentence if you want to harness search engine traffic. Plus by providing more information about the movie it will also help the user decide whether or not to watch the movie.

I agree with Sanjay..for manage on-page Word press and Yoast plugin is very good.

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A good idea for large site on page optimization is siloing the site and making it easier for google to understand the structure of the site

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To manage the website properly and efficiently you must optimize the pages before uploading those pages, try to optimizes the pages same time you create those pages if your are not using any CMS.

If your website is CMS based then it will not be very difficult to optimize but make sure every time you create a new page you choose proper keywords and your page content must be according to that. If you will do this half of the work has been done automatically.

You should check out Yukon's posts about Silo structures or the free WSO that Bnetwork gives away in his signature. Search the user names and you'll find answers to most of your questions.

Some of the key things are dynamic recent post widgets and page excerpts, but you'll find a more detailed explanation about the concept and dynamics when you search their posts / free guide.

Interlinking high relevant pages from within the content will also help to funnel your juice in the right way. It's all about setting up the right structure, SEO plugins only take care of the absolute basics and are kind of useless as there is much more to it.