As you analyze your website for optimum user experience you must not for get to make your contact information easily accessible. Having your contact information visible makes it easy for your visitors to reach you and it also shows them that you are there for them if they need you.
Many people look at contact information details for other reasons, like seeing what city a company is based out of or seeing if your company has a brick & mortar location. But even if you don't list a physical address, just having an email address dedicated to visitor inquiries can make your visitors feel more at ease.
Some webmasters will show a "contact us" link at the top of each page while others opt to make the information even more visible by building the contact details into the website template.
Whichever approach you take, giving your visitors a way to contact you is vital for ensuring a good user experience.