Wow! How to get traffic? <--That is such a broad question. I will just give you a simple answer, because there are tons of ways. Some of the more common ones are:
1. SEO your site, so you get listed higher in the search engines
2. Advertise on sites
3. Advertise on Google Adwords
4. Buy Traffic
5. Promotions
There are tons more, but you can probably find them yourself.