I'll never forget this one time when I was in high school and having a hard time, I don't even remember why or for what reason, but one of my good friends gave me a note that she had written saying how grateful she was that I was her friend and why. That day she thanked me but I'll always thank her for being a good friend to me, esp. on that day. Even though it was just a small short note of gratitude I still think about it and have it with me to this day. Definitely wasn't wasted.