If white is on top and outer side color matches outer edge color - target the edge piece. do R or L' to put it in the back, second layer. U2 to put the corner piece in the back-left or back-right corner, then undo with R' or L.
If white is on top and outer side color is opposite the outer edge color - target the corner piece. R U R' to put it in the back-left or back-right corner with white now on the side.
A W A - move corner over the edge, then U'
A B A - rotate side so that corner is over the edge, then U2