snapping to origon
 

How can I snap an object to the grids origon? Im continuing to practice my modelling, and I'm trying to place my current model across the origon so I can delete half the faces, and then mirror it across the x axis later on. But when I create objects I scale them up manually at random points rather than clicking create and having it pop up at the origon as default. Probably I should get out of this habit where I can. But there must be a way to place an object at the 0,0,0 axes of the grid after its creation. If i put 0's in the translate boxes of the channel editor it obviously resets the object to its origon of creation, not the origon of the grid.

well most times the origin of creation (unless you use the interactive placement for creation) is the grid's origin... when you start moving primitives before actually modifying them is when you get into trouble... after pressing insert to move your pivot point, you can hold down v to snap to a vertex and drag the pivot to a vertex at the edge of your object, leave pivot mode by pressing insert again, and then hold x to snap to the grid and move the object back to the origin.