Time:
I'm very dependent on clocks and timers. Can't easily keep track of time by intuition and guesswork, especially if I'm well-focussed on something, i.e. nearly always.
Maps:
I find good maps very useful, but I can get into problems with them. If I look away from the map, then my short-term memory isn't good enough to retain the details (and a map contains an awful lot of detail).
Also I have trouble relating the flat, "birds-eye view" nature of the map to the real thing because I'm on the ground and there are hills and valleys.
And if I don't rotate the map so that it's properly aligned with reality (north on the map pointing north in the real world), I have trouble, but if I do rotate it so it's aligned, the writing is usually on its side or upside down, which makes it harder to read (it's hard enough as it is when the writing is small, because I'm effectively long-sighted when I've got my contact lenses in).
Maps drawn by other people usually hamper me with too much detail that I don't need, not enough detail that I do need, folds and page boundaries in places that are awkward for me, and colours, styles, scales and conventions that are sub-optimal for my purposes. I sometimes find it better to draw my own map so that I can make it suit my needs better, and when I've drawn it myself I tend to be able to remember the information better.
In spite of all those difficulties, they're usually more useful to me than verbal directions. Without help of some kind I can get lost very easily in unfamiliar places, because roads, corridors etc. tend to look the same to me.