Image by Nemos great uncle via Flickr
From the start, its important to have good control over your new pet, you have to show him whos boss. A lot of Dogs grow up protecting their owner, and this might not be a bad thing, but it can cause problems, when a friend of yours comes close, and your Dog becomes aggressive. I have been in this situation before, but with some training from the local Dog School, my Dog, is now calmer around people.
Watch this video on Puppy Training - Socializing.
This is a simple video, giving out a few tips.
Lets take a look at another video. This is highly rated, and offers more great tips. Its only short, but it offers some great info.