For plots and campaign comic books are an obvius answer: I am corrently warking an a short adventures base on a wolverine short story of wich i don't remember the name.

I like drawing maps based on technical diagrams; e.g. the bones of the inner ear, or the inside of an integrated circuit.
For worldbuilding i did something similar: I drew the bourders of my continent/kingdom using the silhouette of random stuff i get inspired by: the south border is chuck berry guitar, the north is the south border of norway, a lake is the nose of a grotesque statuette and... and to decide in which direction the river goes in/comes out of it roll a d12 as if the lake is the center of a clock... for dungeons i tryed with weird shapeed spiderwebs