What is the objective of the aroma? Stimulation or relaxation? A few ideas:<p>Peppermint, Mentha piperita: mood-elevating, has a positive effect on perception, memory, and other cognitive functions.<p>Lemon, Citrus limon: very uplifting, yet relaxing. Helpful in treating wounds, infections, and house cleaning and deodorizing<p>Rosemary, Rosmarinus officinalis: Very stimulating and uplifting, good to help mental stimulation as well as to stimulate the immune system.<p>Germanium, Pelargonium graveolens: helps to balance hormones in women, good for balancing the skin. Can be both relaxing and uplifting, as well as antidepressant