I have always liked a few songs by John Mayer but just recently I have really been appreciating his work more and more. I'm slowly starting to get exposed to his type of music and as corny as it sounds, I find it very uplifting. It warms my soul and always puts a smile on my face. It is probably the best music to listen to while working.
Take a listen and let me know if it makes your heart a little lighter :)