FlippedNormals on Twitter: "15/18 The 3D Cursor is confusing at first, but very powerful once you understand it. Move it with Shift RMB. You'll do this a lot by accident. Use Shift
Pivot Points 3D cursor in Blender - Coding Ninjas
How to reset 3D cursor to origin in Blender Tips - cgian.com
How to use the 3D cursor in Blender - Artisticrender.com