The number one thing to remember if you’re going on a business trip is that you have limited time in your hands. Plan your days, weeks and month ahead. Maximize this time by organizing and setting meetings before you fly out, use the travel time to do one of these two things: your research on the place and people you are visiting or event you’re attending or administrative work.
Downtown San Diego is less than 20 miles/32 kilometers north of the Mexican border and about 130 miles (210 kilometers) south of Los Angeles. From Los Angeles, it’s 385 miles/620 kilometers) north to San Francisco and from there, another 90 miles/145 kilometers) northeast to Sacramento. You’d put about 190 miles/305 kilometers) on your car driving from San Francisco to Yosemite National Park, and about 600 miles/965 kilometers) driving from Los Angeles to Mount Shasta in Northern California. Needless to say, California is ideal for road trips. 

19. To check a bag or not to check bag. Each airline has its own set of guidelines as to how many bags can be checked or carried on for free. Make sure to look up what your airline’s rules are to avoid any incremental fees. And, if you are connecting during your trip, know the luggage rules/fees for those airlines as well -- especially for regional or low-cost carriers.
When you buy the full tank, the price may be close to the going rates locally, but that's not the gouge. The gouge is that you get no credit for whatever fuel remains in the tank when you return the car. Instead, you donate it to the rental company. So unless Avis, Hertz, or Enterprise is your favorite charity, this option is a nonstarter. And when a rental company fills the car, it typically charges two to three times the local price per gallon (or liter).
3. Always keep an energy bar in your carry-on bag. During one seven-hour delay I experienced in Miami, the airport vendors had literally sold out of food. If it’s a winter blizzard or a massive string of delays, you may be out of luck. Prepare in advance by keeping an energy bar in your bag so you’re always ready in case disaster strikes. Pro tip: At the grocery store buy your favorite kind in bulk -- they often sell them in boxes of 12 or more.
“I’m a firm believer that everything you need for a trip — whether it be three days or three weeks — should be able to be packed in a carry-on. This is simple once you master the art of layering your clothes. Choose a color combination for your attire and pack only pieces that match this so that you can mix, match and layer to create different looks (instead of packing completely separate outfits).” 
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