1)For yard work use a 50ft checkcord, say 'COME' and reel her in, I stress using the command once. Praise her when she gets to you
2)look for training opportunites around the house, if she is walking towards you say 'COME' and praise her when she gets to you.
3)Later on, off leash in the field walking away often works well.

I wait until my dogs are a year old before I introduce the shock collar, That is generally when I start the more intense training. That first year I just want to work on general obedience and get them excited about birds.

I'd suggest Bill Tarrant's "Hey Pup, Fetch it Up" and Richard Wolter's "Game Dog" and "Water Dog"

Jeremy