I cannot hold your hand forever.
Although I wish that you would never grow old; I wouldn't have to talk to you about the birds and the bees, deal with your "teenage rebellion" or heaven help me, boys. If you are only going to learn one thing from your old man, please let it be the following:
Believe in yourself.
Death and taxes are the only two things guaranteed on this planet. There will come a day, hopefully a long time from now, where you will not be able to turn to me or your mother for support. So long as we are alive we will support come hell or high water; I just want you to be prepared in case something happens to us. There are many cliche phrases like "Hope for the best but prepare for the worst" and "an ounce of prevention is worth a pound of cure".
I can take you to the doctor or give you medicine to cure physical ailments, it is not so easy with your self-esteem. I want you to know that anything and everything is possible, all it takes is hard work and perseverance. If you do those two things you will succeed in life. Eventually I will write about what the word success really means, but for now know that dreams can become reality if you do your part.
In life you will meet people who will try to knock you down at every corner. Ignore them. As long as you believe in yourself and what you stand for you have nothing to worry about. It is those who are insecure and feel threatened by you that will give you grief. Do not let them get you down, use their hate/envy/jealousy to fuel your passion and drive.
The objective truth.
Even if you were not my daughter I would tell you that I find you to be incredibly warm and loving, smart, sharp-eyed, witty, funny and beautiful; now that I think about it I can probably fill a book with good things about you. Even the things that drive me up a wall about you can be a positive (e.g. your lack of patience and perseverance in wanting what you want when you want it). Do not let anyone tell you otherwise, EVER.
You are perfect just the way you are.