Making a Simple Perfume - This is one of Many Methods! 

Choose a central theme, and the main material for your perfume. 

Study this central / main material well 

Study the facets of this main material 

Search for other perfume materials online. 

Search top note materials,  middle note materials and base note materials that share similar facets with your main material 

Study all aspects of these secondary (supporting) materials 

Study the strength and impact value of these secondary 

Blend base materials together in a single "horizontal accord" 

Blend middle note materials together in a single "horizontal accord" 

Blend top note materials together in a single "horizontal accord" 

Blend your base, middle and top materials together in the final verticle accord