When its around the time for your devision to start, find a way to WARM UP before your match. Unless your a person that is naturaly energetic, your INITIAL start may suffer without this. Jump in place, rotate your arms, light spar with a friend(if your group is not lined up for competition yet), or other. Be careful not to tire your self out though. If you don't train hard in advance of the tournament, then it's not likely any tricks or stratagies are going to help much at the last minute.