Ill ignore the sexist remark.
I keep mine on computer (not the ipad) because When I downlad a recipe off the net I will adjust it to my own purposes. I can then save it, or save my version of it. Also I tend to put a number of recipes of the same thing on one page if theres a few good ones.
The basic trouble I had was indexing them so I can find them easily.
Do you put Creamy Chicken Pasta under creamy, chicken or pasta? Chicken, pf course as the pasta is just the carbohydrate and could be rice etc and the creamy is a style of the chicken.