Hi, I thought you may like this Mentalrobics exercise from Braingle.com:
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Active Experiences

Previously we talked about how new experiences can create new connections [ For more on 'connections' go here: http://www.braingle.com/mind/332.html ] in your mind, which helps retain memories. Active experiences, where you are actually doing the activity, are the stimulus to create these new connections. Watching someone perform an activity is not the same thing as doing it yourself.

In particular, television is usually not a mind-enriching experience. When you watch someone doing something interesting, only your senses of sight and hearing are involved. When you are actually doing the activity, all of your senses are involved. Additionally, each additional hour of TV watched per day has been shown to increase the risk of Alzheimer's Disease. So, don't sit on the sidelines, get out there and experience!
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For more mind exercises: http://www.braingle.com/mind/