The correct answer to when you should start training your new puppy is the minute you take possession of the puppy.

Keep in mind that training is not always about the basic commands such as sit, down, stay, and come.  Start with these 5 things listed below from Episode #2, and go from there.
Here is The First 5 Things to Teach Your New Puppy:

1. Bite Inhibition
2. Dogs Name
3. Potty Training
4. Leave-It Command
5. Come Command

These 5 things need to begin even before the basic obedience training command such as sit, down, stay, etc. If you teach your new puppy these 5 things from the very beginning, you can prevent a lot of frustration.

Visit our website at http://puppytalkpodcast.com

You can purchase my book here: https://www.amazon.com/author/dalebuchanan

RESOURCES:
Podcast Website: http://puppytalkpodcast.com
Sponsor Website: http://www.topgundogtraining.com
Dale's books: https://www.amazon.com/author/dalebuchanan