Training and socialization are top priorities. It seems obvious but, as I've met unruly dogs, it must not be that obvious to all. Short of those two things, look for videos, forums and communities in general that are specifically for your dog type. Learn about the breed-specific temperment.

And something else to think about: consider getting two of [insert pet]. Sure, you can bring your only dog to the dog park, take it on a walk in the morning and play with it at night, but what about the rest of the time, sitting alone either in the yard or in the house? Dogs get separation anxiety and need a lot of engagement. A normal house is essentially a dog-sized cage, akin to that of a bird. Providing a companion can be life-changing for your pet.