That's a rather vague question.

But http://www.google.com/search?q=goals+seo should be a good start to formulate a better question or maybe even to define your own goals. Such as: "increase the number of visitors to my blog from 1 a day to 2 a day", or "get a revenue of USD 100.000.000 in 2013 in my webshop selling World Championship Football stuff".

Kees