iOS: Throwing your music into shuffle mode is useful when you're not sure what you want to listen to, but doing so prevents you from keeping albums grouped together. TuneTangler is a simple app that shuffles albums rather than songs.
Open up TuneTangler, hit play, and it automatically starts shuffling your albums. You can hit the shuffle button again for another random album. If you prefer to listen to whole albums with the randomness that shuffle mode offers, TuneTangler is an app worth trying out.