How to add an origin point without adding anything else? For example this could be done if you add a cube, go to edit mode , delete all vertice and you are left with an origin point but is there a faster way?
This function is already delivered with Blender, just not enabled. Go to File > User Preferences > Add-ons > Add Mesh and enable Add Mesh: Extra Objects. Now if you press ShiftA in 3D View and go to Mesh > Single Vert you'll have an option called Object Origin Only. This will add an object origin in edit mode and you can start editing.