Nudging Objects:

You can use the arrow keys to move objects very small distances. This is a big win for those laptop users who no longer have mice. Select the object, and then use your arrow keys. Each press of the key will move the object on "grid unit" (1/12th of an inch, don't ask why); if you hold down the Ctrl key while nudging, or if you have the grid turned off, you can move the objects one pixel at a time.