Waypoints.
Quest Markers, so I know where the fuck to go to be completely successful.
Fod Sparta los wuth, ahrk okaaz gekenlok kruziik himdah, dinok fent kos rozol do daan wah jer do Samos. Ahrk haar do Heracles fent motaad, fah strunmah vonun fent yolein ko yol.
The world isn't as bad as you think.
I liked the rune books from Ultima Online. Not as simple as a mages "portal to chicago, la, new york" but "portal to in front of your favorite pizza place in chicago, new york etc"
I'd find that really handy. I mean, shit like fireballs and cure disease would be nice, but... yeah.
I could find a lot of uses for a rocket punch.
"I can no longer sit back and allow Communist infiltration, Communist indoctrination, Communist subversion and the international Communist conspiracy to sap and impurify all of our precious bodily fluids. "
- General Jack D. Ripper.
Vendoring.
Bring random crap to some guy who gives out money for it, even if its some scraps of hair he'll just put it in his bottomless pockets.
Great way to get rid of all the trash and nuclear waste too
Cheat mode :P low on money = gimme sum 5k and poof 5000 cash popped. Only the sky is a limit