A few things to try with your dot:
Building an iOS app? You can ask your dot to test a change in Xcode on a second Mac and send you screenshots of how it looks.
Need to reproduce a bug? Ask your dot to run the same test on your laptop and on a machine with an older SDK. You can compare the two results without changing your everyday setup.
Testing UI updates? Have your dot click through a flow on a second computer and capture where things break. That keeps your own screen and cursor free while you work on the fix.