You sat in plenty of stuffy cabins to earn those frequent-flier miles: make sure you get a good trip out of them. Travel and Leisure runs down the best ways to earn miles and use them efficiently. 
    - Stick      with one airline: The more you commit to a single airline, the better      you'll be treated and the more miles you'll accumulate.
- Eat      more, drive more: Rental car companies such as Hertz double the miles of      some airline customers, and participating restaurants also offer such      benefits.
- Ditch      the mouse for the receiver: Booking a ticket by calling an airline agent      can help you use your miles more efficiently than online booking.