Lachlan
En-Route
Same is true for landing. Usually on base and final your hand should be right there to make SMALL adjustments as needed.
Are you flying with a quadrant or the push-pull style? With quadrant you can comfortably rest your right hand with thumb on one side and (usually) 4 fingers on the other. You'll feel the lever move, if it does so on it's own. With push/pulls I rest my right pointer finger on the throttle shaft. In neither case do I actually grip or hold the knob. I think my CFI referred to this as "covering" the throttle.
(not doing this in some fashion should result in a swift wack on the wrist with the plotter)
100% on this. Plus, chics dig pilots who can take off, fly around, AND land one-handed!