TL:DR; Listen to your work when you want!
Let the computer read your documents so that you can listen to them later.
OtsTurntables Free is a 100% FREE (no spyware, no banner ads), virtual set of professional mixing turntables empowering music lovers, aspiring DJs and pros to scratch, adjust tempo and pitch, play backwards, and mix MP3s, WAVs, Ots files and CDs.
AudioShell is a freeware MS Windows Explorer shell extension plugin which allows you to view and edit music file tags directly in Windows Explorer. AudioShell supports MP3, WMA, Apple iTunes AAC/M4A/M4P, MP4, MPC, monkey's audio, OGG and FLAC files.
TuneFab Spotify Music Converter (Windows) is a fantastic application that can do a lot of amazing things. It lets you download, convert and save DRM-ed Spotify music to common formats, such as MP3, FLAC, WAV, M4A, etc.