Sitemap

Adding a sitemap.xml file to your root directory allows the major search engines to easily index your website. The file points crawlers to all the pages on your website. XML-Sitemaps automatically creates a sitemap.xml file for you. After creating the file, upload it to your root directory so that its location is www.mydomain.com/sitemap.xml.

If you use WordPress, install the Google XML Sitemaps plug-in, which automatically updates the sitemap when you write new posts. Also, add your website and sitemap to Google Webmaster Tools. This tells Google that you have a sitemap, and the service provides useful statistics on how and when your website was last indexed.

Defensive Design

The most commonly overlooked defensive design element is the 404 page. If a user requests a page that doesn’t exist, your 404 page is displayed. This may happen for a variety of reasons, including another website linking to a page that doesn’t exist. Get your users back on track by providing a useful 404 page that directs them to the home page or suggests other pages they may be interested in.

Another defensive design technique is checking your forms for validation. Try submitting unusual information in your form fields (e.g. lots of characters, letters in number fields, etc.) and make sure that if there is an error, the user is provided with enough feedback to be able to fix it.

Optimize

You’ll want to configure your website for optimal performance. You should do this on an ongoing basis after launch, but you can take a few simple steps before launch, too. Reducing HTTP requests, using CSS sprites wherever possible, optimizing images for the Web, compressing JavaScript and CSS files and so on can all help load your pages more quickly and use less server resources.

Back Up

If your website runs off a database, you need a back-up strategy. Or else, the day will come when you regret not having one. If you use WordPress, install Wordpress Database Backup, which you can set up to automatically email you backups.

Print Style Sheet

If a user wants to print a page from your website, chances are she or he wants only the main content and not the navigation or extra design elements. That’s why it is a good idea to create a print-specific style sheet. Also, certain CSS elements, such as floats, don’t come out well when printed.

To point to a special CSS style sheet that computers automatically use when users print a page, simply include the following code between your tags.

Download a Checklist

Dan Zambonini has published a very detailed checklist that covers both the pre-launch and the post-launch phase of the web site life cycle. The checklist contains line items related to content and style, standards and validation, search engine visibility, functional testing, security/risk, performance and marketing click here for the pdf-version.

You may also want to consider the Quick Usability Check List by David Leggett that highlight some of the more common problems designers should address on their own sites in a Usability checklist of sorts.