If you want your site to boost your ranking immediately then you can hire a SEO expert to make your site on top on the Search engines but if you know the strategies on how to make your keyword on top of the Search engines then you can do it by yourself little by little without wasting any money. Below are the strategies that you can try to apply for your sites to get on top of the SE:

Targeted Article submissions
Targeted Press Release submissions
Major Search Engine submissions
Targeted Blog submissions
Targeted Forum submissions
Targeted Directory submissions
Targeted Online Groups submissions
Targeted Classified Ads submissions
Targeted Social Bookmarking submissions
Targeted Social Media Network Submissions
Link Wheel Creation for Major Keywords
Hub Page Creation