The answer would be Circuit Training!  You can get a LOT done in little time.  Pick one exercise per bodypart, do your set then move on to the next exercise, no rest in between.  When you finish a round of all the exercises take a 1-2 minutes rest then do it again!  The beauty of this is that it is also a cardio workout…your heart rate does stay elevated.  If your goal is to lose more fat or get your cardio better then try running on the treadmill or jumping jacks for 2 minutes in between circuits.  Do this 3 days per week and pick different exercises each day.

You will be amazed at how you feel after 2 rounds.  Start with 2 rounds then after a few weeks move on to 3 rounds if you have time.  You should be able to do these workouts in 30 minutes or less.

Example Circuit:

Legs - Prisoner or Ball on Wall Squats or Leg Presses - 15 reps
Chest - Flat Dumbell Press or Push Ups - 12 reps
Back - Lat Pull Downs or Pull Ups - 12 reps
Shoulders - Dumbell Presses or Lateral Rasies - 12 reps
Triceps - Tricep Pushdowns or Kickbacks - 12 reps
Biceps - Dumbell Curls or Band Curls - 12 reps
Abs - Leg Raises or Crunches - 15 reps

Cardio - 2 min. run on Treadmill or Jumping Jacks (if you do not have a treadmill do jumping jacks, run up and down stairs or go outside and run up and down the sidewalk or road for a few minutes)

Repeat Circuit…

In addition to being beneficial to the body and efficient with the time, it is a lot of fun and most of my clients love it when we do Circuits!  I hope this helps.