This will be a simple yet highly effective post. Lighting a bath is simple if you remember one hyphenated word: Cross-illumination
Bathrooms like kitchens have a certain amount amount of task applications. It is important to have optimum lighting for make up and shaving. Its really not that hard in new construction. Place lights on either side of the mirror at about 65-67 inches off the ground for the best results.
The next best would be to recessed lighting on either side of the sink. As far as the rest of the bathroom, its your call...Maybe some water tight recessed or surface fixtures.
It really depends how large a bath. You can always layer the light like a kitchen depending on how many objects therein.