Mac OS X Hints details how to set each one of your Terminal windows to a different, random >> colour </</. When you're sick of multiple windows, give the free, tabbed iTerm a try.
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It's not something you might think about often, but your pee can tell you a lot about your body. This colour-coded infographic shows what different urine hues might say about your health.
The key to maxing out the return on investment (ROI) from your gym session lies in stripping out anything superfluous. You should focus on five exercises, sometimes known as the 'Big 5'. Nothing else.