Fresh baked bread, lily of the valley, homemade spaghetti sauce bubbling away on a slow simmer. Warm, melty chocolate chip cookies (I’m drooling). Frankincense, patchouli, lavender, ylang ylang. Your grandma. Smells are powerful. They can jettison us back to the past – to home, dad, a special trip taken. Scents can calm us down, rev…