Log in to the Spotify computer software or Web player (see Resources).
Click “Follow” on the left sidebar and then click the “Find Friends” option.
Wait for the service to generate a list of Facebook friends who have recently created Spotify accounts, if applicable.
Click the “+ Follow” button for any friend you want to follow.
Ask a friend for his Spotify username. If he set up Spotify via the Facebook app and you used an email address, ask him for his Spotify Facebook username ID number.
Locate the Spotify Search field at the top of the software interface or click the “Search” option on the Web player sidebar.
Enter “spotify:user:” (without quotation marks) followed by your friend’s username and then press the “Enter” key. For example, if your friend’s username is zeo, you would enter "spotify:user:zeo" and press "Enter" to locate his Spotify profile.
Click the “+ Follow” button beneath your friend's profile name to follow him.