Microsoft have launched a free, IIS Search Engine Optimization (SEO) Toolkit that allows you to check your websites for any potential errors and problems that may hinder your search engine rankings. Here's a brief look at this application and how you can use it to help you.
 

When monitoring your own site and the sites you build for clients, it's important to make sure you receive automated reports to help highlight how your sites are responding to various keywords. Exact Factor is a free web based service that will help you do this and here's a brief overview of what you can use them for.
 

One of the great things about an analytics tool is that it allows you to track how your visitors use your website. Robot Replay goes one step further in actually recording their time on your site and allowing you to replay their actions via a video.
 

Along with some other common website design mistakes, you really want to avoid a slow website so checking and improving the speed of a website must be one of the things that you perform when it comes to releasing a new site for a client. We've come up with a quick checklist of some of the things we do before "going live" which you can hopefully incorporate into your own list.