Here are a couple of tutorials that will teach you some procedures for turning your raw motion capture data into a refined motion using various editing techniques. Even if you don't use the mocap sensor, you should check these out to get some tips on how to customize any of your other motions as well!
Beginner Level - Human IK & Direct Puppet
Intermediate Level - Looping & Motion Layer Editing
Advanced Level - Aligning/Removing Motions, Time Warp & Insert Frame