Ok, maybe not your favorite, but which do you use the most?

I'm learning a ton from this group, thanks in advance.

Shift F - Fit to project window w - back to where I was thank you space - play Shift space - pause q - quantise cntl-s - save :)

All number keys (screensets).
D + Shift D = Multidock Show + Max & Restore
I = Inspector
B= Browser
C = COntrol Bar
Shift + Z = Auto zoom on/off
T = HUD
Ctrl + Shift + L/R cursor keys = Switch tabs in multidock

plus a whole host of others but those are the ones showing most wear on my keyboard.

Here's the cakewalk online shortcuts list

http://www.cakewalk.com/Documentation/default.aspx?Doc=SONAR X2&Lang=EN&Req=Menus1.182.html#1306347


I use 'Ctrl S'  (save) a lot cause ever since my X1 crashed a lot.
 
ofcourse 'Ctrl Z' (undo) all the time

Ctrl + Z
Ctrl + Shift + Z
Ctrl + A
Ctrl + Shift + A
Ctrl + L/R arrows
I
B
D
C
F
Shift + F
Ctrl + Shift + F

T
F5 - F10
Ctrl + mouse wheel
Alt + 3
Alt + 6
Ctrl + Space

Ctrl+Z - Undo (Oh, so often)
I - Inspector
D and Shift+D - Multidock
Ctrl+Z - Undo
B - Browser
Alt+L mouse - Split tool (Like it a lot)
Ctrl+Z - Undo
Ctrl+A - Select all
Ctrl+V - Paste
Ctrl+C - Copy
Ctrl+Z - Undo
L - Loop on/off
Shift+L - Loop selected area (Very cool)
Ctrl+Z - Undo.

 
I've customised my key-bindings so that many of the shortcuts I use regularly are reassigned to single keystrokes.
 
I find it incredibly useful to have a free hand if I'm tracking guitar or bass.
 
Here's my latest list:
 

 
 

Alt F4 for the late nights when nothing goes right

Shortcut keys I frequently use

CTRL+SHIFT+PAGE DOWN/PAGE UP (Go to next/previous marker)
CTRL+PAGE DOWN/PAGE UP (Go to next/previous bar)
- Recommended with the right hand only.

Shift+X (X-Ray on/off)
- Since Sonar doesn't remember the X-ray state with the screenset, I use this to hide my most often used VSTs Kontakt 4 & 5 every time I come back to my main screenset.

N (Assign or use secondary Snap to Grid resolution while dragging data)
- I use 1/16 for primary snap and "whole" for secondary snap (I don't seem to like SmartGrid). This way, when I want to move/copy a clip to a different location exactly at the start of the bar, I press N+Shift(+Ctrl) and drag the clip.

Ctrl+Shift+H (Show only selected tracks)
- I often use this before double-clicking the midi clip to open the piano roll view, because the track remains visible above the almost fully displayed PRV. And I just double-click the clip header to select all notes in the clip. 


Shortcut key assignable commands worth assigning

Help | Quick Start
- I assigned this to Alt+Q.
 
Launch MIDI Input Quantize Settings
- This opens a dialog box that allows you to change input quantize settings of ALL midi tracks at once.

View | Fit MIDI Content
- The default fit content command assigned to Ctrl+F doesn't fit midi content in the regular piano roll view, but this does (so why not overwrite Ctrl+F).

Bounce To Clip
- I assigned this to G (just because Studio One uses G, too)

Lock Clip Position
- I assigned this to Y (Yeah!)

Unlink Clips
- I assigned this to Ctrl+Alt+U.

Center View on Now Time
- I assigned this to the period key, but I don't seem to use this command at all.

Strips | Narrow All Strips
Strips | Widen All Strips
- I assigned thses to < & >.