If we are being out-rebounded I will clearly identify that point and what we must technically do to change that statistic. Keep your halftime talks from going the full length of the time. You spend a half-hour warming up before a game. Keep your key points to a minimum. Most players can't handle more than 2 or 3 major points at a given time and digest the information into a useable form under pressure.
Motivation comes best when it comes from within.
A player and team's drive to reach goals should be motivation enough if you give them key details, which help ignite that drive. I normally give my team one or two drills to start the second half warm-up based on my teams concentration and intensity level coming out of the halftime. If they are playing strong and relaxed, I give them some rope but what them at full speed 2-3 minutes prior to the start of the second half. If they are sluggish and unfocused, I'll give them very specific drills to pick up their intensity. The Basketball Highway .