Be aware of important things to avoid with your
new puppy:  

Avoid putting your puppy on the ground where
unknown animals have been until he's had all his
puppy shots. This is how he picks up diseases.

Avoid having your puppy become unnecessarily
frightened in his first few months of life. Introduce
loud noises (vacuum cleaners, hair driers, etc.)
carefully and slowly. Lifetime phobias for your puppy
are imprinted during these early months.  

Avoid overtaxing your new puppy. He needs lots of
sleep and tires quickly.  Be aware of signs of
hypoglycemia in small puppies.

Avoid having your puppy around dogs you don't
know to be safe and friendly or around rough
children. Your puppy is breakable.

Don't ignore your puppy's whining when confined in
his crate. Take him out to potty, even if it hasn't been
long since his last visit outside and you suspect he
just wants attention. If he goes to the bathroom,
praise him and allow him to remain out of his crate
for a while. If he doesn't, return him to the crate.  
However, don't reward your puppy for whining by
taking him out of his crate just to play or cuddle.
Wait until he's quiet--then take him out!   

Don't allow your puppy to expect to always be held
or played with.  Accustom your puppy to quiet times
and being alone for short periods of time. This will
prevent separation anxiety later.   

Don't allow your puppy to feel abandoned by leaving
him unattended for long periods of time.  Know that
love and attention are just as important as food and
air to an animal who was born to be a companion to
his master.   

Don't forget to praise your puppy. Praise is a
stronger motivator than harsh words or discipline
for a puppy who lives to please.   

Don't wait to start training and socializing your new
puppy. The first few months are a critical period in
his development and you can't get this time back!