Here’s some good advice from A List Apart on web design and navigation: 

Any good global navigation scheme should, at a glance, answer the top three questions every user has at the back of their mind on any page:

1. Where am I? (Present)
2. Where can I go? (Future)
3. Where have I been? (Past)

Here’s a test: Go to any random page on the internet. A deep page, not a home page. Then see if you can answer all three of those questions without looking at the URL or mousing over links to see where they go. See if you can tell your present, future, and past purely through visuals. Even in our brave new Web 2.0 world, most sites fail.

Does your firm’s web site pass the test?  Check out the article for lots more great stuff.