In addition to what everyone said....

1) Get more inbound links that are related to your website
2) Alt tags on photos
3) H1 tag on the main keyword phrase of each page. i.e. "<h1>Sunglasses at Discount Prices </h1>
4) Put "Sunglasses after each category on your navigation bar, like:
All Sunglasses
Metal Frame Sunglasses
Fashion Sunglasses
Casual Sunglasses
Sport Sunglasses
etc.

5) Aim you meta tags toward the product (keyword) on each page. For you home page something more like this:

<title>Sunglasses: Discount Sungalsses, Best Sunglasses, Popular Sunglasses</title>
<META NAME="DESCRIPTION" CONTENT="Sunglasses at East Coast Shades, quality sunglasses at wholesale prices, large selection of replica sunglasses. ">
<META NAME="KEYWORDS" CONTENT="sunglasses,sun glasses,discount sunglasses,polarized sunglasses,coast sunglasses,sunglasses julbo,cheap sunglasses,men's sunglasses,armani replica sunglasses, gucci replica sunglasses">

6) Work on each page's content, using keyword or keyword phrases, but don't overdo it.

Good luck!