I would have thought that I would have read this book long ago, but I'm getting around to it now. Although Jane Jacobs makes it very clear from the start that she is talking about large, great cities; that her ideas won't be the right prescription for small towns and even small cities, from what I've read so far I think there is something to be gained.
Activity is the key to safe, viable areas. There needs to be a variety of uses and a steady stream of occupants for much of the daytime. There needs to be a reason to be there. All of this is applicable to creating any public space in my opinion. A space established with only one purpose and no supporting destinations to feed it is destined to be a underused space, or a mis-used space.