Heather,
I am doing the same thing for Doug. I have assembled a photo book with family pictures and quotes. What I did for him that I know will be meaningful, is I have put in sayings that are important to him. For example, he loves the phrase carpe diem. Also, he goes on a fishing trip every year and he calls it his "Vision Quest." Just stuff like that that will make it more personal for him.
My problem has been keeping him out of the bags that I have "hidden" these in! He is so nosy
Deb