Off the top of my head ...
SHF+B brightness/contrast
SHF+G gamma correction
SHF+H hue/saturation/lightness
With a floating selection on raster layer or selected nodes on vector layer
arrow keys move 1px
CTL+arrow keys moves selection 10px
SHF+arrow keys move about 50px
... they're different in PSP versions less than 10 but I forget how
Dont forget the right click menu with vectors & nodes ... muy useful