Just Do It (Let's Get Fictional)

p.s. Just do it. You've procrastinated for a long time.

I read those words in a piece or paper in the park. It's a letter, I suppose. I didn't know whom it was for but I feel like being reminded to start the project.

"Excuse me. I left a piece of paper here. Do you see it?" a girl, 15 years old I guess, asked me.
"Is this yours?" I gave her the paper.
"Oh, thank you. I just need to read it everytime I'm about to procrastinate." She then put the paper inside a sketchbook.

Note:
This post is a response to today's prompt in Writing 101, "You stumble upon a random letter on the path. You read it. It affects you deeply, and you wish it could be returned to the person to which it's addressed. Write a story about this encounter."