Sparring Drills: where you stay in and the partner changes out. 1min/2min Spar, 20second rest, fresh partner, another round. 5 rounds or until you can't go anymore.
Footwork drills: set up cones in a cross, start in the center of the cross, move forward, back, left and right without stopping. Feet always moving. you can add in a bag holder at the top/forward cone position so when you arrive there they can have a strike shield, thai pads or focus kits for you to hit and then keep moving. 10 sets, no stops, changing stance and work different strikes.
Bag Drills: throw everything you have at the hanging heavy bag or 1-3min. rest and repeat.
Run: Find a good path, hill, treadmill or elliptical and do work.