Yeah transferring between the L and the F at 14th st always throws me off because of the stair turns, I'm not sure why that station in particular gets me because there aren't even that many staircases, but I always have to triple check I'm getting on the right L train.

The phone number on your bag is a good tip. I have a wristlet/wallet that i take everywhere and my keys are clipped to it on a carabiner. After my dog died last summer I clipped his dog tag with my phone number onto the carabiner as well—two birds with one stone, i can commemorate him and hopefully someone will call me if they find my wallet and keys.