The first thing you need to do is pick your keywords. Any effort you place into
SEO is worthless without knowing which keywords you would like to rank for. This step requires a good amount of analytical research and experimentation - as you embark on this first step, I do recommend using a program such as
Google Analytics on your Website, which will be a huge help throughout the keyword selection process. Be prepared to spend at least a week or two researching your keywords and selecting those with the best ROI. There are many keyword research tools that would be of great help to you at this time, including my own MyEasySEO.com site.
As for on-site
SEO, you have nothing going for you. Your title, META description, and META keywords tags are too generic to ever rank well. There is absolutely no text on the homepage that will help with your ranking.
Another thing I noticed is that your signature here at YE isn't even linked to your Website. It is links like these that, even if they do not help with indexing your site in the SEs, will at least help build real traffic by sending real visitors to your site.
Here is what I would recommend: focus on only one category of products, find a way to differentiate yourself from other merchants offering the same thing. Then, choose keywords that receive high-volume searches and are related to the category you operate under, and optimize for those keywords. With the breadth of products you are now offering, I don't see your
SEO efforts being very successful.