Axis plane indicator
Free move origin
Shift control click = Sub-select
Click,control drag = Extrude
Drag tap alt = Copy
Some tools that are great to know
Relocate the gumball
Align to Cplane
Align to World
Align to Object
Find ten examples of contemporary jewelry/jewelers that utilize 3D printing in their work. Specifically look for joints or flex points. Post them to your blog.
Try to model some linkages. Do screen shots or renders so we can all look at them together. Create an animation using the animation tool in Rhino (I will go over this today). Upload your video to your blog.