While trying to make a low poly vector portrait, I have to select multiple objects (one by one) while using the eyedropper tool.
Is there a keyboard shortcut or trick that may help me speed up the process?
With the Eyedropper tool active, holding cmd* will allow you to select objects. Adding SHIFT to that will allow you to select multiple object (exactly as it does with the Selection tool).
*on OS X at least, so I assume Ctrl on Windows does the same, as with most Adobe shortcuts.