Help in letting go

I too am a high D (7511). I have to focus on delivering negative feedback only when my mindset is "improve the future behaviour" and not "punish the past deed". I don't always get it right. Not sure which recent podcast it was (perhaps Heart of Feedback ...) that recommended not delivering feedback if you can't smile while you deliver it. That has helped me.
- Dave 

What does it mean to be "right?"
Remember to be right about the most important things, not everything.  The most important thing is your relationship with your directs. 
Every general who won a war lost some battles.  Washington retreated from almost every battle he fought...but made sure to win the ones that really mattered.  If he had tried to win every battle, he would have lost the war. 
You need to think strategically, and recognize that you're right about the BIG picture even when someone else thinks you're wrong about something trivial.  Let them think their little thoughts...you know who's really in control here.  Ha!   
And when you go negative, you're wrong.  Can you stay in touch with your strategic self?  
John Hack  (High I, High D)

In the classic: "How to Win Friends and Influence People" there is an anecdote about a person claiming to quote the Bible when it is, in fact, from Shakespeare.
Sometimes folks just aren't willing to hear you...even when you *know* you are right. Arguing at that point is fruitless. Besides, which lessons in your life "stick" more...those you were told or those you discovered yourself?
So throttle back a bit and preserve the relationship. (High D...off the chart C)

 
Try to be curious and interested instead of falling to what  you know and directing.  You have something to learn from every exchange and listening more and being open to new concepts is important to keep in mind when you're high D comes into focus.
Focus on the process and learning.  (High D, High I)

I am totally in TBerge's camp on this one.  High D myself, I have found the Socratic Method absolutely AWESOME in settings like that. "And did you confirm that? Which source did you use? And do you agree with it?  What points do you agree with?"  I told my team right up-front that a great number of times, if they bring me stuff they might end up getting a ton of questions back designed to probe, dig deeper, learn more, fine-tune, etc.  Letting them know up-front that there would be questions took some of the shock out of the approach, I think.  They were less confused by the 'onslaught' of questions back from me because they were expecting it.  After the first one or two times, they started learning to think critically for themselves -- "What will she ask me when I send her this? Let me address that proactively before I give it to her so it's one less thing she'll ask me!"
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DiSC profile: 7-2-1-5

LOL Tom. Never would have guessed ;) 
 
Great suggestions everyone.