I use a collection of simple devices called a "maps."
These consist of sheets of paper, sometimes bound into a book, usually called an "atlas," upon which is printed a representation of an area of ground drawn to a specific scale, the actual scale depending on what the individual map is intended to be used for.

By skillful use of these maps, I can not just plan a journey from A to B, but detour via C, D & E etc!

I also tend not to be caught out by being guided up unsuitable roads like the poor sod I found on Bonsall Moor last year trying to reverse from a deeply rutted track into a narrow gate to turn round after being misguided by his Satnav!.