I bad....I don't do teeth and I know I should! Now that the boys are over one year, their sweet puppy breath is a thing of the past!
Nails - I try to do weekly, but worst case, bi-weekly. You want to keep the nails trimmed short. If you let them grow, the quick (that's the sensitive part of the nail) grows with the nail. Once the quick gets too long, its extremely difficult to get nails short again.
Also good to get pups in the habit early of having ears, teeth, nails, manipulated.