Do this routine before every shower: 50 jumping jacks, 5 pushups, 20 crunches, 20 mountain climbers, and 30 second plank. So worth it. I'm up for anything that's seems like a quick workout!
At-home cardio workouts
30-Day Squat Challenge
Get Fit Fast: 10-Minute Total-Body Workout
45 minute treadmill trainer