Adding a Link to top of pages for Checkout or Shopping Cart

I think I had already asked this question or possible suggested it but can’t seem to find it.

I would like to see (especially on the products pages or other pages that are produced via Marketpress) A Checkout or Shopping Cart Button that would take you to your Cart as well as a continue Shopping Button on the checkout page that would return you to the Store

Any and all help is appreciated.

Thanks!