If you talk to internet marketing specialists they may talk to you about making life easy for the visitors to your site and how this can help in generating enquiries and prospective clients for your firm.
There are several elements of websites that can often be changed, or should be thought about, when looking at how easy your website is to use. Many of these are touched on in a very good book called "Don't Make Me Think!: A Common Sense Approach to Web Usability " by Steve Krug. The main points can be summed by by saying that people as generally lazy and when looking at a website they don't want to have to think about where to click next or where the information is.
Bear this in mind when designing your website - for example, ask your website designers to include your contact details on each page (maybe in the header area of the page), these should really include your phone number, email address (usually a generic info@ type address) and even your office address. When you are thinking about the website navigation make it easy for people to find their way around the site - if you have the site split into sections don't make the home link go to the first page on the section, people expect it to go to the home page for the site. Try to include "breadcrumbs" so that visitors can get back up a level in the site without having to use the browser "back button". Remember that functionality scores over design when it comes to websites - please try not to have a "splash page" (a page with images and no text) as the first page of your site - this means that visitors to the page have to think about what they should do next and where they have to click to get into the site.
When it comes to content I am not a fan of pages that list all the services that you provide as an accountant. If I am looking for someone to help me with my tax return then I want to see a page that is about tax, likewise if I want someone to help with annual accounts then that is what I want to read about - I don't reallly need to know that you can also do auditing, payroll, provide inheritance tax advice and advise me about pensions. Put these subjects in the navigation (or as links at the bottom of the page to make it easy for me to find out about these other services if I am interested), don't make me plough through paragraphs about pensions before I find the bit I am interested in.
Make life easy for your visitors and you stand a much better chance of getting enquiries from them that you can convert into clients.