This also applies to men, older women, anyone really. Developing the ability to look people in the eye and engage with them on a personal level. The more old ladies you chat to in line, the more experience you gain for approaching girls.
I got up early on the morning of my birthday a few years ago and googled the best way to kill myself. Looking back it seems so crazy, but at the time it all seemed so normal and workmanlike in the planning.