Timing:When you are feeling down.
Listen to the quiet. Turn off every sound possible so you can actually hear what silence sounds like. It might require a drive to a more secluded location, or turning off appliances in your house.
Please refer to the blog for more details on this activity.
I often get restless in silence. I never knew it can make happy. On this I had to know how... I found out the reason in tinybuddha.com