How to Make Homemade Air Fresheners

I am always trying to keep the house smelling nice and it is definitely not an easy task.  The one place that I would like an ongoing nice scent is the closet, specifically my bedroom closet.  It is a walk-in closet that seems to lose the scent that I place inside of it quite quickly.  Replacing air fresheners on a regular basis can get quite expensive.  So,