Do you ever feel like you live your life by lists?

Grocery list, to-do lists, bills to be paid list, bucket list, favorite things list, looking for in a man list....

Why do we categorize things so much? Why the need to write things down? I do not know the answers but I do know that I love to put the X in the box or strike through the thought. It's like putting in the flag at the top of the mountain - completed!