No space for souvenirs if you over pack.

You do not realize that you have over packed until you have unpacked and packed your backpack a few times.
You manged to organize all your 12 shirts, five pair of shorts and 10 sundresses in two hours at the comfort of your home. When you wake up late with only 45 minutes to catch the last bus of the day you need to make sure you can shove it all in within ten minutes.

Here are a few suggestions:

1. Leave 1/4 or 1/3 of the backpack empty
2. Pack your backpack within a reasonable time frame
3. Read suggestion 1.