Another way you can cut your workouts down is to combine exercises. I like to work my abs while I'm doing my biceps workouts, triceps, etc, so I get my ball out and bend one knee on it and support my weight on the other while doing the other exercises. It saves time and works both sets of muscles at the same time. You just have to be careful to keep your abs in, don't lose your balance, and work those biceps, or whatever muscle group your exercising.
Good luck! God bless you!