I have a similar problem.

Our yellow lab is a big sweetheart but doesn't liek to be alone. She has been to obedience school and did very well but once in awhile she gets really rammy and jumpy.

These are a few things that have helped.

1) Dominance and Submission
Get your dog on their back and straddle them staring them in the eye. When they look away they are acknowledging you as the 'alpha'. Hold them in place a bit then get up slowly telling them to 'stay'. Free and praise.

At first this was a bit difficult because Gully likes it! Now however I tell her 'stay' when I dominate her and she is much calmer. I then stroke her ears while she is down and tell her that she is good.

2) Sometimes she just needs to run. Saying "want to go outside" and opening the back door teaches your dog "outside"=fun. Whether it is to put them out for a bit or to start a play session , both work.

3) Training. If I say "want to do soem training" she loves it. It means treats, attention and lots of praise. A few minutes a day will work but it tends to turn into a game. You will be impressed. Your dog will remember obedience school.

4) Chew toy. You probably have these. Find something they really really like to chew and leave a few around so they can rip at them when they need to horse around.

I hope this helps. I am still training my dog and she is still teaching me to be a puppy.

HB