Last week I did giant sets, as described by Ms. Olympia , Nicole Wilkins on Fitness RX.com,  at the gym. They were so much fun. I did focused on one muscle group per day for six days. For example on shoulder day I did: 

1. Read Deltoid Flies

2. Military Presses

3. Shoulder Lateral Raises

4. Forward Raises

I completed   those again and again 15-20 reps until I had done all exercises four times. What a burn!The first two rounds are easy. The next two sets are tough. But boy it's fun. My legs days and triceps days were the best. I really felt the burn. I was very sick for two weeks though and hadn't done a good legs workout so perhaps that's why my hamstrings burned a lot. Good times!