One mistake I see people make all the time when traveling for work is trusting the airport boards too much. Gate agents often delay updating bad news so the desk doesn’t get flooded all at once.
If I think a connection might be tight, I usually just check a few apps on my phone instead.
Flighty has been great for tracking my exact flight and it often updates delays or gate changes faster than the airport displays.
TripIt is useful because it keeps your booking reference saved offline, which helps a lot if you suddenly need to rebook and the airport Wi-Fi is struggling.
I also keep Airhelp installed because it automatically tracks delays that might qualify for compensation.