Overselling

Your flight is oversold. Delta is seeking volunteers with flexible travel plans to exchange their seats for compensation ... If interested in volunteering see your gate agent at the airport.

Cool. I like the way this smooths over variations in demand by adding a little fungibility into the mix, and inconveniencing everyone the minimum amount.

However, do you know what would be a really convenient time to exchange your seat for compensation? BEFORE YOU SPEND FOUR HOURS GETTING TO THE DEPARTURE GATE! If everyone's checked in online, couldn't people be voluntarily or involuntarily bumped THEN? Rather than killing themselves rushing to the gate and then entering a lottery to see who makes their connecting flights and who has to sit in an airport for hours and doesn't?

Last minute checklist - what have I forgotten

I almost always have to get up at an unseasonable time to catch flights, and hence have the morning's itinerary planned down to the minute. However, today I've got two hours between a very late lie in and having to leave, which I'm totally unaccustomed to.

It even seems my bags are comfortably inside the weight and size limits (assuming you use the same units for the bags and the limits), which seems completely implausible.

However, I did finish packing last night, and may well have blanked on something important.

So:

1. Is there anything else I should throw into my bags, if I can?

2. Other than passport, what bits and pieces am I most likely to have forgotten?