If you’ve never tried Amazon Music Unlimited, the premium subscription music service from Amazon that gives you access to tens of millions of tracks, now is a pretty good time to give it a shot. For a very limited time, Amazon is doubling the usual 30-day free trial to a 60-day free trial through a new promotion. To get in on this offer, follow the instructions on this page. You just need to click a button and sign up to try Amazon Music Unlimited for a full two months at no charge. This offer ends in about a week on March 25th, so sign up soon if you’re interested.