Make sure you are well rested.
No last-minute cram training in the days leading up to the race. Remember DOMS sets in 48 hours post exercise, until this time your body is in repair mode and wont be at full function or strength. Try to keep active in the days leading into the race but keep exercise gentle and low intensity. Of course there are exceptions to this rule and some short high intensity bouts of exercise that don’t cause fatigue have been found to be beneficial.