Not all fans will visit your website regularly. Having them sign up to your mailing list is the easiest way to keep them in the loop.
Rather than just asking for their addresses, why not give them an incentive to sign up? Here are a couple ways you could do this:
Give away a free MP3 to fans who sign up to your list
This is easy to do, using the "thank you message" option in the mailing list. You can provide a link to a file directly (addresses can be found in Design-File Manager), or…