Those are great ideas. I recommend the LIND Institute, Chris Brewer and Gary Lamb for great music selections. I put it all in iTunes, and then play it from my laptop using external speakers.
For the environment, be cautious with color - sometimes different colors can bother people. For example, red can have seriously bad or good reactions, depending on culture. I use light blue and light green for evaluations, pre-work and homework. Blue is pretty much always safe.
Also, you can modify your environment by moving chairs around temporarily, bringing in some cut flowers or just putting red plastic… >>>