Bless you for taking him. I would definitely try to get him socialized with other (healthy!) dogs, especially older ones who know all about dog manners and can help him learn. I think that is probably the most important thing you can do - so he can learn how to be a dog. Also, like one of the other members was saying, bite inhibition will be important, but most puppies haven't mastered that even by 8 weeks, so I think you'll be fine.
Also found this bit of info doing a google search (I typed: what does a puppy learn from it's mother?):
From four weeks of age a puppy is conscious of what part of his body is being touched. Breeders need to regularly handle each puppy, very gently and calmly turning them over and checking them, touching different parts of the body, such as feet, ears, and teeth, etc. In this way the breeder will be exposing the puppy to minor stress, which will help him build up his coping skills for stress levels he may encounter later in life. This is good for the development of the pup's mind and also influences the adrenal-pituitary system that will help him later in life. All experiences at this stage must be positive.
Breeders should allow people of all ages including small children to frequently and gently handle the puppy and he should also be exposed to as many different situations indoor and outdoor in a careful, calm way, which help stimulate and develop the pup's mind. Exposure to different situations should be handled carefully and with a positive association so that the pup does not develop fear. The puppy will become habituated to his normal surroundings that will prevent him from becoming fearful or spooked by everything around him.
Hope it helps, good luck!