I got rid of the television. We used to have a TV in the bedroom, but then we decided that watching TV in bed was a habit we wanted to break. So we ousted it. Now the bedroom is reserved for sleeping and reading.
I also bought a true HEPA air purifier. It's pretty awesome. Not only has it seemingly cured some of my allergy issues, it also has a peaceful hum that puts me right to sleep. I like a little background noise.
We've also invested in allergen-barrier cases for our pillows (normal pillowcases slip right over them) and really soft 100% organic sheets from Target. I know some readers aren't happy with them, but we love ours.
What do you do in your bedroom to make it peaceful and healthy?