5. Overpacking
What it is Check a third bag or surpass the 50-pounds-a-bag limit, and you'll pay.
What's so bad Just when you're being forced to check more luggage, the airlines are cracking down on weight.
Ouch! An extra bag can cost you as much as $185 at American, $180 at Continental. Overweight-bag fees hit $100 at Delta. At Virgin Atlantic, you'll be charged $50-$200 (depending on your ticket price).
What you can do Distribute your stuff among your bags evenly (two 49- pound bags are okay). FedEx your luggage.
Money Magazine writer and travel expert Donna Rosato lets novices in on what the pros already know - flying in style is easier than you think. (more) 
