Whereas reserving a premium, high-quality car can cost you an arm and a leg, if one of these vehicles is available when you go to pick up what you do reserve, you stand a chance at snagging one for a much lower price. Simply ask if one of these upgrades is available, and come ready to negotiate. (It helps here again to flash that smile and be nice). Travel expert Eric Rosen also recommends being savvy when it comes to paying for car insurance, as many credit card companies include coverage already. “In my case,” he writes, “3 of my credit card companies offer this little perk which saved me $200.”
Never do these 9 things! 1. NEVER forget that your boss is evaluating you at all times. 2. If you are on a business trip, it’s because you’re supposed to be part of the solution—not part of the problem. 3. Don’t be late. 4. Never be rude to staff—any staff, ever. 5. NEVER drink too much. 6. Don’t be difficult or ask for special favors. 7. Don’t let your boss lull you into behaving unprofessionally. 8. Keep your cell phone out of sight. 9. Never cry or lose your cool, no matter what happens!
If you don’t like a country’s customs, remain open minded, rather than immediately jumping to conclusions that you’re right and it’s wrong. Ask questions, research more, and listen to other peoples’ point of view. And don’t let your bad experiences taint an entire country — if you had a crap time somewhere, it doesn’t mean that the country sucks or it’s not safe. Maybe it was just bad luck.

It’s a far cry from doctors’ typical jet lag tips ― like avoiding caffeine and alcohol before you try to sleep, slowly adjusting your sleep schedule to a new time zone or even using small doses of melatonin to help fall asleep when your body typically wouldn’t want to, the study’s author Cristina Ruscitto, a researcher in the Department of Psychology at the University of Surrey (and former long-haul air crew member), told The Huffington Post. The idea is, she said, “that you readjust by eating in line with local time ― not just sleeping on local time.” This revelation could be an easy fix for jet lagged travelers everywhere. 
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