I would add: get plants. Having plants seems to reduce stress in the workplace, and I imagine this effect works at home as well. In addition, I think plants just make rooms look more appealing. I'm not sure if well-made fake plants have the same stress-reducing effect, but I bet they do. I have a number of fake and real plants in my bedroom. Fake plants are low-maintenance, but they do have to be dusted every so often. Real plants need watering, and they have to be replaced eventually.

Another good idea is to have a couch, loveseat, divan, or big, comfortable chair in your bedroom (if you have room). This gives you a place to read/watch TV, etc without using the bed. There is some research suggesting that people who do work or watch TV in bed have a harder time falling asleep or don't sleep as well.

Getting a "sunrise alarm clock" might also be a good bedroom addition.