Understand your puppy's particular breed behavior and needs. Research your dogs breed traits and special needs or any behavior that you should be aware of and look out for. For example, If your puppy is a tiny little chihuahua, their bladder will be very small and they will need to urinate more frequently; accidents will happen even if they are well trained.

Letting your pup outside every hour or two gets old, but it’s the simplest way to prevent accidents from happening. If you’ve ever wondered why some people choose to get new puppies during the summer or when they’re on vacation it probably has to do with potty training. If you’ve house training a dog before you know how much time & commitment it takes.
There are several medical issues that can interfere with potty training. Dogs with a urinary tract infection (UTI) will urinate frequently in small amounts, and will not have much control. You may also notice excessive licking of their genital region. If you notice a change in the consistency of their stool, the cause could be a gastrointestinal issue. Some common causes in puppies are intestinal parasites, having eaten something not in their normal diet, or a sudden food change. If a food change is necessary, do it gradually over 5 to 7 days. If you suspect any of these issues could be a problem, you should consult with your veterinarian.[19]
Crate training is a great way to start your puppy off on the right paw. Dogs have a natural instinct to keep their den clean, so a properly sized crate, introduced gradually, will create a home base for your puppy and will keep him from having accidents when you can’t watch him. Use the crate when you’re unable to give your puppy your full attention during the day, as well as at nap time and bedtime. Selecting the right size crate is critical, and it should be big enough so that your puppy can comfortably stand up, turn around and lie down but not much bigger. If you opt for a crate that’s too large, your puppy will be able to potty in one corner and sleep comfortably in the other, defeating the purpose of crate training.
Many owners appear disappointed that their young puppy will not toilet when out on a walk, yet relieves itself the second it gets back home. This is because the puppy has been taught to toilet only at home (hopefully in its garden), and being creatures of habit, they often wait until they have returned home before evacuating their bladder and/ or bowels.
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