So you say that you don't have enough time to workout? I doubt it. One of my favorite ways to get a great workout in with a shorter amount of time is with complexes. With a complex, you combine multiple exercises into one larger movement. An example would be a squat and overhead press. Here is an example of a great workout that shouldn't take you more than 20 to 30 minutes to complete.
Front Squat and Overhead press 3-5 sets x 8-12 reps 45sec rest between sets
Romanian Deadlift and Row 3-5 sets x 8-12 reps 45 sec rest between sets
Stability Ball or ab wheel rollouts 2-3 sets x 10 reps 30 sec rest between sets
A barbell or dumbbell can be used for the complexes. Combining multi joint movements like this allows you to stimulate a maximal amount of muscles throughout your entire body in a shorter amount of time, and also proves to be a very fatiguing and effective workout. If you think that you don't have time to get an effective workout in, think again. You don't have to spend hours training to get a good workout in.