Hammerspace. (Or, some kind of video game-esque inventory system.)
I would never have to worry about the hassle of physically carrying things around. I would never have to worry about forgetting something important. I would never have to be like "aw, man, I wish I had brought [X]!", because I could keep just about everything I'd ever need with me and it would all be easily accessible without any effort -- all without any of the drawbacks of physically carrying
any of it. No more heavy backpacks. No more digging through pockets. No more frustration over the fact that clothing designers everywhere for some reason decided that women don't
need pockets.
Because
this woman won't be needing any. >:]