Personally resizing would be the last thing I would do, always do your PPing on a file that contains the most information.
Sharpening should be the last bit of post prossessing (changes) you shoud do before you resize. The amount of sharpening depends on how good the shot was in the first place ie. exsposure, it will also depend on the camera body and on the auality of the lens in the most part. What program do you use to sharpen?
I would not use this approach personally.
When I am resizing I do the resize after any other forms of editing including maybe a first sharpening pass - but then finish sharpening after the resize.
This way I am sharpening exactly what will be seen/printed - because when you reduce the image size you loose some of the detail that has undergone sharpening.