I have been real relaxed lately. I was looking back on this post and it made me realized how much has changed since I originally wrote. There are a few things that have contributed to my relaxed state:
1. I have been taking less work home.
2. A lot more exercise - just like xice10 said, staying healthy is so important to relaxing. It sounds funny saying that exercising has helped me relax, but it's true. I am more calm during the day when I exercise in the morning and I feel great. I'm training for a marathon and just finished a half marathon this weekend!!
3. Playing more music. This is one of the most enjoyable things for me. When I get home from work, I make an effort to get out of the work clothes and pick up the guitar before I get involved in anything else

4. Reading and writing.
What works for me, might not work for everyone, but it helps to stay healthy and do what you enjoy!