When your dog knows the release cue and how to sit on cue, put him in a sit, turn and face him, and give him a treat. Pause, and give him another treat for staying in a sit, then release him. Gradually increase the time you wait between treats (it can help to sing the ABC’s in your head and work your way up the alphabet). If your dog gets up before the release cue, that’s ok! It just means he isn’t ready to sit for that long so you can make it easier by going back to a shorter time.
The next option is called luring. Get down in front of your puppy, holding a treat as a lure. Put the treat right in front of the pup’s nose, then slowly lift the food above his head. He will probably sit as he lifts his head to nibble at the treat. Allow him to eat the treat when his bottom touches the ground. Repeat one or two times with the food lure, then remove the food and use just your empty hand, but continue to reward the puppy after he sits. Once he understands the hand signal to sit, you can begin saying “sit” right before you give the hand signal.
Set up his private den. He needs "a room of his own." From the earliest possible moment give your pup or dog his own, private sleeping place that's not used by anyone else in the family, or another pet. He'll benefit from short periods left alone in the comfort and safety of his den. Reward him if he remains relaxed and quiet. His den, which is often a crate, will also be a valuable tool for housetraining.
Teach a cue. Introduce your puppy to a sound cue that means, “food is coming.” Some people like to click and treat, some people use a word like “yes,” and some people cluck their tongue. Whichever you use, the method is the same: In a quiet, distraction-free area, with the puppy on a leash and collar, make the sound. The second your puppy turns toward you and/or looks at you, reward him with a treat. After a few repetitions, you’ll notice your puppy not only looking at you, but also coming over to you for the treat.
It typically takes 4-6 months for a puppy to be fully house trained, but some puppies may take up to a year. Size can be a predictor. For instance, smaller breeds have smaller bladders and higher metabolisms and require more frequent trips outside. Your puppy's previous living conditions are another predictor. You may find that you need to help your puppy break old habits in order to establish more desirable ones.