Put two caps full of vanilla extract in a coffee cup, then place it in the oven at 300 degrees for one hour. Within twenty minutes the whole house smells like Heaven. It's actually a common realtor trick.
How to: Clean Under Your Kitchen Sink in 10 Minutes
You know that wonderful smell when you walk into Williams Sonoma? Here’s how to get it: water, sliced lemon, 3 springs of fresh rosemary and about a teaspoon of vanilla. Simmer on the stove....this smells amazing! I used 2 lemons, 3 sprigs of rosemary and about 2 tablespoons if vanilla. It only took 5 minutes to make the whole house smell fresh! - My-House-My-Home