Sign up, give it a try. Think of a good user name that you won't forget.
Install the Delicious buttons on your browser so you can easily bookmark or share sites with your fellow Delicious users.
Go out and find some sites, then "tag" those sites as you post them to Delicious using your new handy dandy browser button. How do you tag sites? Simply put in a series of keywords that you feel best describes the site that you're at.
Or when you find a web page you'd like to add to your list, you simply select the delicious bookmarklet, and you'll be prompted for a information about the page. You can add descriptive terms to group similar links together, modify the title of the page, and add extended notes for yourself or for others. You can access your list of links from any web browser.