What's the best way of displaying output in other VI ?

For example, in a sub-vi I continuously acquire a motor position, and I want the position value to be displayed simultaneously in a numerical indicator or waveform in the main vi.
I know there are lots of ways to implement this easily, but I just want to know what's the best way which use lest computer resources, say memory....
Can control reference be used effectively for this?
Thank you for your suggestion.
Dejun

here is an example (in LV7.0) of what Dennis is refering to.
P.M.
Putnam
Certified LabVIEW Developer
Senior Test Engineer
Currently using LV 6.1-LabVIEW 2012, RT8.5
LabVIEW Champion
Attachments:
ctrl reference folder.zip ‏7 KB

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