Follow Friday is a weekly occurrence on Twitter that you will surely run into while checking out your twitter stream. Every Friday users can recommend individuals that he or she feels is worth a follow. Nothing stops you from doing so everyday!
Simply use a few words to describe the individual or individuals and link to their twitter account. At the end of the tweet, use the hashtag #followfriday.
The Twitter Tag Project Follow Friday makes it simple for you! All you need to do is to type your Twitter username and it will randomly pick a subset of your active friends.