I hate that you're having a bad day, baby, and I'm sorry for it. I was going to write a long inspirational note but then I decided that this might be better AND it isn't just a one time letter!
I'm sure you noticed when you opened it all the little strips of paper. If you dump them out (careful so you don't lose any) you'll see that each one has a word on it. There should be -
When you feel as if you need one of these come back to this envelope, take the strip of paper out and put it into your pocket to carry with you. This way all you need to do to remind yourself that you have it is to put your hand in your pocket and find that little scrap of paper. It'll be like a little piece of me is there with you, too.
I love you,