The secret for a glove-tight fit for trim corners is a coped joint. With this technique you can even make complex crown moldings fit without leaving gaps. http://www.familyhandyman.com/carpentry/trim-carpentry/how-to-cope-joints/view-all
4 Inch flat back foam crown moldings - Crown molding solutions
Indirect lighting (or rope lighting) installed in a bedroom. Install a dimmer switch for varying accents and moods -- A really nice touch when installing crown molding.
30 Year Old Kitchen Makeover traditional kitchen, bead board above cabinet
exterior corbels and brackets - Google Search
This handy little “cheat sheet” can be used on any crown molding project that requires inside and outside corners. Visit Dunndiy.com to learn more about how to measure, cut, and install crown moulding.