Just so agressive

[Freedom]

What Karen and Moon & Bean said.

Be sure to always carry treats with you. I take a baggie with cut up bits of hot dog. (Did you know a hot do can be cut into 67 pieces for training? I've never made more than 60!)

You make sure the dog focuses on you, treat, get the dog to sit, treat. Treat liberally at first, to re-enforce the proper behavior. You can practice the "look at me" at home, even when you are alone.

Never heard of water balloons for training! Not very practical!

[akitrix]

Water balloon downright dumb & impractical, never throw ANYTHING at your dog, it teaches nothing good. If that's the only advice, then you need to find a more knowledgable trainer. Dog Star Daily is an excellent blog site staffed by some of the best animal behaviourists and trainers. Lots of good advice and insight.