Flight attendant of 10 years reveals whether it's okay to cut the boarding line and the correct way to ask for an upgrade

• Rich Henderson has worked as a flight attendant for a major US airline for 10 years. 
• He shared some of his top travel tips, like how to change seats and which drinks you should avoid.
• Bribing flight attendants with candy or gift cards won't get you upgraded to first class, he said.

Is it safe to drink the airplane coffee? Can I switch to that open seat a couple of rows up? Will I get in trouble if I board before my group is called? 

If your internal monologue sounds anything like this while flying, you're in the right place.