What are some good softball drills to increase my base running speed?

Do running drills in general. The more running you do, the faster you will become. Also running stairs or hills will help you increase your speed. I was able to get from home to first in 2.65 seconds, and I did a lot of running drills with my teams. Do liners, shuffles, shuttle runs, and squats to increase your leg strength. Also make sure that you are hitting the inside corner of the bag with you left foot as you are running to shave off some time. Also practice so that you are not taking shuffle steps before you get to the base, this slows you down big-time. (My home-to-home time was 11.14 - these methods do work).