Consistency is the third vital factor in housebreaking a puppy. Consistency in schedule, in feeding habits, in praise
and reward for proper behavior and in verbal reprimand when accidents occur, is of supreme importance. 

Scolding occasionally for accidents but ignoring others, feeding at irregular intervals, lack of praise for soiling
on the dog's papers or in the yard – all will only serve to confuse and discourage your puppy. So be consistent
and have total awareness: your awareness of your puppy's whereabouts, his needs and urges, and his signals informing you of what's on his mind.