My husband and I were out the other night, and without going into too much detail, he touched my hair and messed it up. I complained that I didn't have a comb with me. "Don't you have one in your Filofax?" he asked.
That got me thinking. A small comb would fit into a Filofax, perhaps in one of the large pockets in the back of some organizers. Or what about a comb that snaps in like the Today marker?
I used to have a calculator that fit into a credit card slot.
What's the most unusual thing you've ever carried in a Filo?