Daughter has a fantastic memory when it comes to my phone numbers. We've moved twice, and each time I got three new phone numbers-- home, church, cell. Each time she has found the numbers (I didn't think she necessarily needed them all) and memorized them immediately.
I wish she could transfer that same skill to memorizing her passwords on the computer. Over a year ago I set her up with a new password for iTunes. I set her up a new email account, because the previous one she had set up for herself, and hadn't put my email address in as a rescue address. I wrote down the usernames and passwords. She lost them.
Today I reset the gmail password and then, once I could get into that, was able to go in and reset the iTunes password. She has put them on stickers on the computer she uses here at the house. I have put them in a file on my computer. She's grateful, and I'm grateful, because she did quite a bit of cleaning around the house yesterday evening and today. I'm going to get her an iTunes gift card to put on her account. She'll be happy.