Lost on how to write my personal statement

Okay so I have no idea how to write my personal statement. I know they want to hear something unique, but to be honest I have nothing tear jerking or something inspirational that made me want to be an optometrist. I love to travel, but don't know how I could relate my experiences to traveling to optometry. I have no idea how to even begin? Does anyone have any ideas or suggestions to how to write a good personal statement?