Great post by Mark regarding Prison workout. You can use your body weight for great workout, so stop making excuse that you are too busy to hit the gym.
Here are two great videos by fitness legend "Jack Lalanne" . These videos may be old but they are still relevant.
Why are people tired ? In this video he explains why people are all pooped up when they wake up in the morning, they feel lazy all the time. He explains 3 main reasons for these :
Lack of Exercise.
Empty calories.
Nervous Tension.
Enjoy the video
10 point self improvement plan. Here is 10 point self Improvement plan by Jack :