After you search and find an item, [F3] will search and find the same item again. [SHIFT]-[F3] will find the same item, but will look behind your current cursor position. Obviously, you can also press the Find Next button on the Find and Replace window, if it’s open.
One thing to note about [F3], is that like all searches, it will obey the rules you’ve setup on the [CTRL]-[F] find dialog (even though it’s not open).
