The key to successful house training is to have a consistent schedule. That means consistent feeding and watering times and also outdoor times. You will need to feed your dog at a set time. No free feeding during house training. I know that some people choose to leave food out for their dog so that the dog can eat whenever he is hungry. That is fine normally, but during house training you will need to get your dog to eat on a schedule. A schedule is important because if you know when the food and water are being consumed then you will soon have an idea how long after eating your dog will eliminate. You should be able to predict at what time during the day your dog will need to eliminate to within a window of 30-45 mins.
Don’t forget to schedule water too. In the wild, dogs do not have access to food and water 24 hours a day. They have access to food when it is available and access to water when they travel to that resource.  Below is a sample schedule. Adjust it accordingly for your household. You may be able to skip the 11am-1pm outing, or the 5pm- 6pm outing with older dogs, or dogs that you have a good idea of waste elimination times. I also did not include playtime or other activities that your dog may need.
Sample Schedule
7:00 am outside for morning bathroom
7:15 am fed breakfast, given water
By 9:00 am let out for short walk (no more than 20 min)
11:00 am – 1:00 pm outside again, given water.
5:00 pm – 6:00 pm out again
7:00 pm fed dinner and given water
8:30 pm-10:00 pm let out
Bedtime
Make your schedule and stick to it. If you take your dog for a walk or to play at the park, schedule that time as an eliminations break. Be certain that you confirm your dog has eliminated, and don’t forget to pick up any waste. You can learn a lot about the quality of food that a dog eats by the state of their solid waste. It the stool is firm and compact then the dog’s diet is healthy. Everything is connected; the quality of food affects dog behavior.
Making your schedule and sticking by it is the first rule in the process of house training your dog.