Test your information architecture online! CInspector is an webbased tool that allows you to evaluate the findability within your website sitemap, classification system or taxonomy.
Usability and user experience testing is vital to creating a successful website, and only more so if it’s an e-commerce website, a complex app or another website for which there’s a definite ROI. And running your own user tests to find out how users are interacting with your website and where problems might arise is completely possible.
Jakob Nielsen's 10 general principles for user interface design. They are called "heuristics" because they are more in the nature of rules of thumb than specific usability guidelines.