The steps to Teach your Dog to Sit are as follows:
Hold a treat slightly above your dog's nose and bring it back slowly over his head.
When your dog's bottom hits the ground, click and treat.
If your dog keeps backing up, practice against a wall so he can only go so far.***z-topcontentad.shtml***
Repeat this until your dog is offering Sit readily.
Take the treat out of your hand and, holding your hand the same way, entice your do to Sit. If he Sits, click and treat; if he doesn't, go back to using a food lure for six to eight more repetition.
Once your dog is doing this reliably, verbally label the behavior Sit right before the dog's bottom hits the ground.
Repeat these steps in various places until your dog is responding well with no mistakes.
Now, without a treat in your hand, ask your dog to repeat the behavior more than once before you click and treat. Start with low numbers of repetitions like tow, three, or four Sits before you click and treat, but don't follow a patter.
To help him generalize the behavior, start practicing somewhere new, the pet store, the park, the vet's office.
Remember that forgetting is a normal part of learning and you will need to go back to helping the dog, with a treat in your hand if necessary, if the place you are working is very distracting.
To test your dog's training, try for ten in a row. If he gets less than 100 percent, go back to practicing before asking for the behavior in that environment.
Watch this quick video on how to Teach your Dog to Sit.