How do you know if your site doesn’t suck? You don’t, do you? Do you know if you need to re-design your Web site? You don’t, do you?
But I suppose you can try to figure it out any number of ways: For example, you can check out the “Stanford Guidelines for Web Credibility -- http://www.webcredibility.org/guidelines/. Or maybe you can hire a muckety-muck, famous Web designer who will of course tell you that your site needs a redesign (because maybe he needs that new Mercedes convertible).
OR…. You can simply go on over to the Search Engine Land blog and go through the nine questions there to guide your decision. See? Wasn’t that easy?