"The Other End of the Leash", buy it, read it, live it. Dog social interaction is different than humans, if you understand how dogs think you can train any dog easily. After reading this book I've passively caused dogs their owners say are rambunctious/troublesome to be very obedient and friendly. You'll look like Caesar Milan, and it's not complicated to do.
Four lessons I learned in adopting an older dog you can avoid: Get her used to
-various types of play toys
These are the things that become increasing difficult to adapt/teach a dog to later in life.
If you don't have access to a pool or lake, give her water bathes every few days, hold and support her in the water so she gets used to having it surround her body.
introduce her to busy streets, etc. early so her senses learn to ignore the loud noises and distractions that would cause her to be frightened in these situations later in life. go for a jog along busy streets, or long walks. the physical activity is obviously good for her on it's own, but it will help her learn to ignore the noise and distractions as well.
buy all sorts of chew toys, balls, frisbees, etc for her to play with young. it's very easy to teach them to play with the various types of toys (fetch and such) when they are young. older dogs tend to not pickup on how toys can be a fun distraction from the boredom of life.
Socialization, it's the single biggest mistake 90% of dog owners make. Dogs need to be socialized around both other dogs of all types and ages and around humans of "all types" and ages. Doggy day care and dog parks are great for dog-dog socialization, and human socialization as well. Have friends come over to play with her. have them (and yourself) get her body used to being touched by humans through petting, caressing, etc. and to all parts, paws, to nose. This will cause her to be naturally friendly and soft-mannered to other people and dogs and should eliminate most of the bark-to-play many dogs display.