Petite Golden Retrievers tend to be very social dogs no matter what their pedigree. They prefer not to be left alone for long stretches of time and will try to follow you wherever you go (just like Mary's little lamb.) To help your dog get the socialization time they need, bring them to a dog park; there they can mingle with fellow furry critters of all shapes and sizes to their heart's content.
Petite Golden Retrievers enjoy engaging in activities that workout them out physically, they'll also need to be introduced to a number of activities that work them out mentally to keep them sharp between the ears. Ring stacking activities are a good start, as they're very easy to pick up yet hard to put down because they're just so fun!