It all depends on how much money you want to pay for someone to visit the site. After that it is up to you. If your site is not a selling experience then getting someone to the site is a waste of time, as they will never buy. So, in that case Adwords in itself will help you not.
A more cost-effective and effective way of getting site visitors is to generate back-links to it. This can be achieved by writing articles about the content of your site so that qualified visitors arrive there. Again you site must be good at selling once the visitor has arived.
There are many articles on HubPages regarding the creation of backlinks and writing articles. If you also seach on ezinearticle within Hubs you will fins some gems of ideas for you to work with.