Entry for the APK Workout Log contest =)
With a lot of us going to school whether College, University, or High School, we're stuck lugging huge backpacks full of text books around as well as being short on cash. This contains similar concepts to that of Kettlebell training and Weighted Vest training. There is also some juggling and weapons training included.
http://www.youtube.com/watch?v=Wfa_ovl2S1M21 lb Backpack (you can use a heavier or lighter one as desired)
Be careful the straps don't rip off...you've been warned

Workout Routine:
2x10 Jogging Up and Down Stairs
3x10 Double Arm Backpack Swings
2x10 Single Arm Backpack Swings
2x5 Asking Questions (Bicep Curl to Vertical Lift)
2x5 Backpack Heaves
2x10 Paper Retrievals (Squats)
2x1 Chin Up Negatives
2x5 Shoulder Shrugs
2x10 Tricep Dips
40 Second Elbow Plank into
20 Second Hand Plank
10 Tuck Up Tuck Jumps
30 Knee Pushups (not shown)
15 V-Snaps (not shown)
Wall Splits
Extras:
Juggling
Weapons Training
The Backpack Fail