Sudoku

My friend made this sudoku for me in class last year. I had the hardest time with it - partially because it's difficult, and partially because my brain was SO fried. Anyway, I never finished it, and then lost it when I packed up and came home. However, I found it last week sometime when trying to find some old notes, so I re-wrote it to try to do it again. I'm having much more success this time. Anyway, I took a picture of the blank one (it's so much easier to upload pictures than scan them, at least at my house) so you guys could try it, too! Let me know when you solve it!

Love,
Scout