Part 1: Fantastic Nurseries
The main things I think you'll learn by studying these photos are
1. Stay away from cutesy or cartoony or commercial stuff
2. Don't be afraid to let your own personal style show
3. Don't be afraid to use some well placed antiques or vintage pieces
4. Be creative and use some colors for the walls and decor that you might not immediately consider "nursery" colors!
ps...these rooms pretty much guarantee your future child will be a successful genius.
(for part II see here) and (for part III see here)