You need to provide more info. such things as * keyword research * use of h1 coding etc * correct meta tagging * SEO plugins * images with correct alt text and captions * bolding, underlining and putting into italics your keyword * interlinking the pages and posts There are a lot of aspects that work well with wordpress. You need to let us know more to help you with your site
A quick search on Google can bring you thousands of useful tips... Anyways here are 20 Practical SEO Tips to Super-Charge Your WordPress Blog!
First of all, you should check that what is your SERP of wordpress blog then make a optimizing strategy for blog. Optimization can be done in view of traffic or Page Rank or SERP.
I am agree with this guy. Give us URL to optimize it. We will give your best advice to optimze that blog.
use keywords in your post titles and make sure you post relevant content, also try and get a lot of really good backlinks.