One of the games I used to play a lot was Hero of the Golden Talisman for the Commodore 64.

But, as much as I played it, I never really got very far. Lots of the passages look alike, and it's real easy to get lost.

For some reason, it never dawned on me that I should have made a map, like this one (drawn by Michael Lambert and available here).

Which would have helped me figure out where I was, where to go, and how big the game actually is.

Any time you play a game with a moderately complex, maze-like layout (Metroid, I'm looking at you), drawing a map is a great way to keep track of where things are. And, no, they don't have to look great, they just need to be good enough that you can read and interpret them.