Cinnamon: Cinnamon is such a power packed herb, that its smell alone is actually a few million dollar industry. Cinnamon scented candle, soaps, hand washes, air and room fresheners are very popular and for a reason. Studies hint that just smelling cinnamon boosts mental alertness and focus.

Besides, cinnamon also triggers dopamine receptors, boosting your sense of happiness. Great was to end the day when you want your senses to calm and mind to clear right before hitting the bed.