Don't leave without checking out the plaque in the lobby listing the famous guests from the hotel's heyday.

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He paid for Johns Hopkins U. working as a busboy at the Breakers Hotel in Palm Beach, teaching Hebrew School part-time and checking IDs outside a gym.

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Sophisticated mobile applications, with the power to do anything from checking the weather to checking you into a hotel, were downloaded more than 10 billion times in 2010 alone.

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Last May, in a fit of bleary-eyed jet-lag, I made the mistake of checking into a hotel without running through the standard list of questions I normally ask at the front desk to ensure I get a good room.

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