Hi
Don't forget too that many people will arrive at websites through the search engines. Therefore you need to be sure the landing page is completely relevant to their search. It will increase bounce rates if users don't arrive at the very product or service that they just searched for.
Keep your clicks down too. The more clicks between the entry page and the conversion stage, the more you will see people dropping out of the process before they hit that all important "BUY NOW" button!
Use your analytics to track it all and you will soon see where your problem areas are!
That is the beauty of the internet: It is all trackable and quantifiable
Cheers
Toni
PS> I must sort my photo out...I am looking a bit squashed!