Adam,
If you haven't already, create an account with Google webmaster (I think its called something else now) and create a Google analytics code for your site. It sounds harder than it is. You then put the code in your website, and it tracks visitors, what pages they are looking at, for how long they look, etc.
It's worth its weight in gold. You can then see what pages need work, what pages are holding their attention for longer etc. and change/make better the pages that need work. You can also track how many visitors your getting, and if its a lot, but your only getting a handful of enquiries, then you know its something to do with your website.
Its free, and its helped me tweak and fine tune my site.