One of the best ways to stave off mid-winter’s blues is by downloading a new set of albums. Think of it as early spring cleaning for your iPod. There are some great ones to look forward to, whether you like the optimistically upbeat or raw rock. On our download: Cake’s Showroom of Compassion, The Go! Team’s Rolling Blackouts, PJ Harvey’s Let England Shake or The Decemberists’ The King is Dead. Also on the horizon—Santigold’s Q-Tip-produced latest.