Worried about your big carry-on bag fitting in the overhead bin? When selecting a seat, choose your row carefully. Airlines tend to board planes in blocks of five or 10 rows, so row 21 may board before row 19. Also, be bold: when the gate agent calls the group ahead of yours, get in line as soon as you see that people have stopped joining the line. The odds are that your group will be called before you reach the Jetway, and the worst that can happen is that you'll have to wait to board — at the front of the line.