POOP FREEZE - the name says it all. Pick up doggie doo the easy way.
Take off the leash – if the park is properly kept and your dog trained, it should be ok to let your dog run free.
Small Dog - some dog parks have an area for small dogs. It's easy for the little guys to get pushed around when they play in the big dog area and you'll find they are happiest playing with other small dogs.
Leave the toys at home - if you bring toys your dog might be preoccupied with guarding it or fighting with other dogs over it. Let the park be about socializing with other dogs and running free.
Walk yourself - don't just watch your dog exercise. Take this opportunity to take walk around the park and walk yourself.
Pick it up - the park might be for dogs but you still have to pick up the piles. Some parks provide poop bags and trash bins.
When in doubt, leave - your first concern should always be for your dog's safety. If you think the park is unsafe or other dogs might harm him, leave. It's better safe than sorry.
Be Vigilant - it's easy to talk with other owners and not pay attention to what your pup is up to. Remember it's your responsibility to keep your dog safe and keep him from harming others.
Keep it down - Raising your voice, even when giving commands, can frighten or excite dogs and encourage bad behavior.