Do a keyword research for your main keywords. Then choose the high search keywords that you think you can dominate then gathered all the keywords and optimise your homepage, subpages. I would recommend 2 to 3 keywords for each pages for you to focus in optimising.
Search your main keyword (example: Hollywood) in Google adwords keyword tool or in some other good keyword tool and then see the keywords displayed and their monthly search count. Pick a couple of medium monthly search count keywords and start optimizing your site for them.
First according to the theme of the webpage you have to prepare a list of keywords whatever comes in your mind, then with the help of keyowrd suggestion tool you can get search volume and competition for the keywords and according to high search volume and low competiton you have to prepare a list offinal keywords for optimization.
You can first check your website content and choose your keyword according to your product or services and then use Google extension tool for more related keyword. You can also check the traffic and competition of your competitors websites and for an idea.