When doing a shopping site, the best way is to reference some successful stores, like Amazon.

In the area of link tracking, for example, to see which section of your frontpage yield better conversion:

Amazon way:

Generate an unique URL for each link in the frontpage, such as

http://www.amazon.com/gp/product/B0083Q04IQ/ref=s9_pop_gw_g424_ir04/175-6575053-9292830?pf_rd_m=ATVPDKIKX0DER&pf_rd_s=center-2&pf_rd_r=0AMJCKBBQA63EP0XHB86&pf_rd_t=101&pf_rd_p=1263340922&pf_rd_i=507846

Google way

Use Google Analytics

<a href="/products/abc" onClick="javascript:      
pageTracker._trackPageview('/from-main-menu/products/abc');">

WHat are the pros and cons with the above two approaches (besides Google require JS support)?