What Does and Doesn't Work

As the Sheltie specialty looms I'm training Blitz and Moto daily, sometimes twice daily if I have time. It's a delicate balancing act with Blitz as I don't want to overtax him. Moto on the other hand is building endurance and we're moving from the Teacher to the Coach position with him. I've been Coach for Blitz for quite awhile now.
It's a challenge as both dogs have not only different sizes but completely different personalities.
What works with Moto: Food rewards. I'm fading them now but still "surprise" him with a treat for a particularly good performance or use when upping the ante on a certain behavior.
What works for Blitz: NO food or toys. Amazingly, the thrill of just working is enough for him. When I use food or toys it detracts him from the task at hand. I actually get better performances just praising him or allowing him to jump up on me.
What works for Moto: hand signals, particularly on the finish. DOR is also better with a hand signal. I'm glad. I've heard far too many screaming "DOWN!!!!" in the next ring at their dogs (trust me, I've been guilty of that as well).
What works for Blitz: voice commands. I actually will get a flying finish just saying Swing or Around. Hands still bring a zippy finish but he will not jump.
Those are the most glaring differences. There's different heeling cadences, when to make eye contact, adnauseum. I don't know how people showing multiple dogs do it. My hat is off to them. For me, I just hope I do the best for them I can when our time in the ring comes in 2.5 weeks. Oh dear!