Once, I was talking to my friend about how thankful I was for my teachers, and how amazing they were. My friend told me that I should tell my teachers that. I, being shy, told her that I would not. She said, "What if they were going to leave tomorrow? What if today was your last day to ever see them? You would be so upset that you didn't tell them how much you appreciated them... You've got to tell people when you appreciate them, 'cause what if you never have another chance?" 

 

So, take my friend's advice. Think of that person that you really appreciate and thank them. Write a letter, record a video, email them, anything to let them know. :)