... and ensure there are at least two flights you can take to get to work, and, usually, have options on other carriers (most ST tickets can be used without further endorsement on other airlines such as BMi and Virgin), and, if long haul, have back up tickets through an 'easy' station such as JFK.
I don't commute by air, but would be subject to a disciplinary if I was late back from holiday. To date, following the above, I have never had a problem.