ok, about the triggers. Our life is built on them. You put your running shoes- doggie knows he is going out with you, you put your working shoes- doggie stays home. Open cabinet with doggie dishes- meal is coming. Lots of seemingly uninvolved things become precursor for doggie to "anticipate" fun/ good time/ meal is coming and as such builds an arousal. It is just plain ole classical condition, Pavlov's experiment with ring bell and food/ salivation...
You often build triggers you not even aware about.
http://susangarrettdogagility.com/2012/03/building-effective-triggers-into-your-dog-training/
If you watch that video in SG blog I started building that sucking air sound and whispering "code" phrases like "1-2-3" or "I am going to smoke ya". I am just not finishing the phrase completely and say something like 1-2- 2 and quarter etc
I am not sure how much are you judged between exercises and what can you build into your obedience routine, here I think I can take a whooshy breath and have my dog jump high between doing exercises...
Now you have to find something your dog is really crazy about. Not just like but really really nuts. Like my dogs really like to " chase" kitty. Kitty in reality never in danger as she is rarely in the house to begin with/ her choice/ and she is very dog savvy but anyway. So I say my whooshy sound and tell them go find kitty- they really run with speed of light and will overturn furniture along the way...
Now in obedience when I make that whooshy sound they perk up just like Susan's dogs in the video... wait, are we going to have fun now? here? So arousal immediately up and as result beautiful attention to me... I only need it for 3 minutes at most in the ring, right?

Another thing I am working on is Che has series of trees he really crazy about. Like he is total nut when we walk on leash there, he will run me over and jump and bark like maniac on them. I used to be pretty embarrassed by it as normally he very loose leash trained etc but now I just put it into controlled behavior he has to sit and I will pull out that " 1-2- 2 1/4- etc 3" game and let him reward himself by jumping and carrying on...
Thus just like in Pavlov's experiment my 1-2-3 words are becoming precursor to huge payoff coming. I can not take a tree to my agility but I sure can take 1-2-3 and get my dog speed up like a missile
