Buy more in cart page
After you add a product to the cart, if you direct the user straight to the cart, there could be an option to add more products from the cart page. Since you will just have one product in the cart and nothing else on the page. The user may not wish to go back and search for something, but they could be presented with similar products that could easily be added into the cart. As the customer has already clicked add to cart, they are more likely to add more from the cart page. Amazon implement this way of thinking, but X-cart so far has not taken this route.