Unless you deliberately sign off, however, you'll appear online and available for chat with friends -- even while you sleep.

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Traveling across the world and turning your biological clock essentially upside down can definitely cause problems with sleep, both while you are away and when you return.

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The key is to have a portfolio that minimizes the chance of having to sell during a down market and that you can stick with while still being able to sleep well at night.

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And remember, FlipShare has to be running and streaming video over the dongle the entire time you're using the set-top, so a lower-powered machine might feel the strain -- and if your computer goes to sleep, hangs, or crashes while you're watching the FlipShare, well, you won't be watching it any more.

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So sleep here with me and I'll keep you close for now, while I try to live up to you.

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Momentum investing might be a fine strategy while it works, but you tend to sleep better at night if your stocks have attractive fundamentals and appear to be cheaply valued by historical standards.

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