Your best bets are XLR8 ladders. Perform 2-3 sessions with them a week or use them as part of your warm up. Perform drills like single foot, double foot, icky shuffle/sidestep run, lateral run, lateral in and out, hopscotch, etc. Always focus on having light fast agile feet. Minimize ground contact time and make sure you don’t hear big heavy thuds, this means your tendons are aborbing the force as opposed to your muscles. Speed Skipping is also a good bet. Skip for 30 secs on 30 secs off for10 mins as a pre weights warm up.