One thing we can all do is 1) make sure GCT or your flight providers give you enough time between flights in case of delays all the way around (late departures, baggage delays, etc. 2) give yourself enough time to go through security, and 3) even if you check your bags, there are bound to be lines there because of reduced staff.
I know for us, with both of us having knees replaced, we have to give ourselves enough time to get wanded, even when we go through xray screening, we still get wanded. All this makes delays possible, especially when you are in back of someone who is really getting the third degree wanding, and then you, too. So, that's one of our ways--arrive at airport early.
Also on the flights check what GCT arranges (or your flight provider) for you. On a time when I hadn't checked in several weeks, when I finally did, I noticed both airlines we had to fly on from our airport, connecting to the other airport, for the flight to Europe, changed flight departure times; that gave us only 50 minutes between flights; if we didn't leave our airport on time, we wouldn't have made the Europe flight departure at all. I emailed immediately to the Air Dept GCTand within a few minutes we had even better flights, but the best ones had already been taken. We got the last available flight that we would accept. You never know what can happen, so check your flights often (I do it once a week).