Console 1 - it is so nice to be able to use both visual and auditory cues in cutting/boosting eqs.  And the plethora of knobs!!!  And the inclusion of compatibility with many of the UAD plugs.  This is so much more refined than automap or Act or any other thingy that helps control Sonar.
 
X-Touch.  I have a keystation 88 and numerous Novation thingies.  But the X-Touch seems like a very elegant way to deal with so many parameters!
 
What have you guys and gals found that really enhances workflow?
 
Thanks

oh - UAD.  I am a UAD plugin junkie.  

Boss GT-001.  Dial in a tone and go.  Direct monitoring and low volume to keep family happy.

Insert Piz Midi chords
Klanghelm SSDR
Expanded AD2 (I love rhythm Transform tools, bouncing back and fourth with Sonar so glad I picked up the custom kits)
CA2A
 
 

Kam - yeah the expansion packs are mostly very good.  
 
I forgot to add Soundtoys - I use that stuff all the time.  

Hi.
Console 1 has been with out a doubt my biggest improvement in workflow 
2nd place goes to my FW 1884 
All the best.

My Mackie Control Universal and my collection of Waves plugins. These two in themselves have contributed a lot to Sonar. Not that Sonar doesn't have great plugins, but I sort of like the Waves plugins a little bit better,  just a little bit... just a teeny-weeny, weeny, weeny, bit better.   
 
Hey Bakers, if you give me a free Cakewalk T Shirt and a Cakewalk Mug, I'll never use another Waves Plugin again,... Well, at least for a month.

My short list is:
Fabfilter Pro Q2
Waves SSL Bundle
Sountoys EchoBoy and Echoboy Jr.

Zargg
Hi.
Console 1 has been with out a doubt my biggest improvement in workflow 
2nd place goes to my FW 1884 
All the best.

Console 1 huh? I have been thinking about that. Perhaps for the benefit of others (and myself) could you give a couple of details on how Console 1 fits into your workflow and how it has benefited you? I have been on the fence about it and would like to hear from a SONAR user that I trust on how it fits in for you.
 
Thanks brother!

The connection between my brain and my fingers is the biggest improvement in my workflow.