Though your 5lb puppy may be an adorable ball of fluff, s/he will not always be that tiny. Habits that are adorable at 5lbs can be downright dangerous at 100lbs. Puppies are in the sponge-like time of there lives where every interaction is a learning experience in which they test and explore the world around them to find limits and guidelines on how to interact with the people, pets, and objects in it. Discouraging difficult behaviours from the start is ALWAYS easier than correcting them once they are fully formed habits. Here are a few training points to keep in mind with your new little ones!  

1. Mouthing. Puppies begin growing their adult teeth around 8-12 weeks, and are teething from that moment onward. As a responsible owner, you should begin teaching your puppy about acceptable chew toys immediately. Should your puppy begin chewing on an unacceptable object, like a shoe or television remote, take the object from them and replace it with one of their toys or bones, praising them when they chew on the appropriate item. The same goes for chewing on fingers, or mouthing on people. Replace your limb/appendage that is in the puppy's mouth with the appropriate substitute, then praise. If your puppy becomes playfully nippy, trying to start playtime with you the way s/he would with littermates, there are other options. One of the easiest ways if a toy is not available, is to make a high pitched squeak anytime the pet mouths you, and immediately disengage and walk away. This is similar to what the puppy's siblings would have done, teaching that they only get attention when play is gentle.  

2. Jumping. Most puppies jump because they want attention, and will do so in the direction you are facing. Stopping this can be as easy as turning your back until the behaviour stops, moving away as needed, and then praising or treating the puppy once all four feet are on the ground. There are other methods to try for more persistent offenders, but this is a simple way to start. Please also remember that anytime you pet or pick up your puppy while s/he is jumping, you are telling the puppy that this is a behaviour you want.  

3. Access to Spaces. While a puppy may not take up all that much space on the couch, a full-grown dog is a different story. If you plan to allow your companion on the furniture as an adult, it is a good idea to wait until potty training is completed. #savethecouches Allowing a pet on the couch as a puppy, and stopping, later on, can be problematic, and hard to curb.   

4. Treats. Pets do not need human food, and all their required nutrition is included in balanced pet food. Treats are a training tool, not a mandatory part of their diet. If you don't ever feed your pet from your plate, and let them taste human food, you will stop begging from starting.    

Consistency is the biggest thing with any sort of pet training. Flexible rules are difficult for puppies to grasp, so save yourself the trouble and keep the same rules all the time. Once you have a well trained, obedient dog, you can begin introducing the exceptions to the rules.