Eyedropper tool lets you sample color or type attributes from objects and apply them to other objects.
Measure tool measures the distance between two points.
Gradient Swatch tool lets you adjust the beginning and ending points and angle of gradients within objects.
Gradient Feather tool lets you fade an object into the background.
Scissors tool cuts paths at specified points.
Hand tool moves the page view within the document window.
Zoom tool increases and decreases the view magnification in the document window.
The note tool is super helpful if you've got multiple people working on the same file. You simply click with the note tool and a note icon shows up. Type whatever you need to in the note palette and everyone can view it! It's also helpful if you have to stop a project before you're done. You can leave yourself a note with what your next plans were.