As you read whatever answers are posted to your question, just keep in mind that there's often a difference between the scheduled arrival time and the actual arrival time.
I fly on too many business flights that are one, two, or three hours late. I avoid connections as much as possible, because it's too easy to miss a connection if your first flight segment runs late -- which can mean that your second flight segment has already left by the time you get to the connecting airport.
The advice you'll see over and over on this board is to fly in on the day before. I know that's not an option for everyone, but it's good advice.