Citrus is my regular, daily, stress reliever. I tend to need a little aroma therapy moment each afternoon. I use some good hand lotion, rub it in on my hands and then my temples then hold in from of my noise and breath it in and try to relax.
For very stressful moments - I have a vase with some dried lavender sprigs and after a real stress I pull off a bud and squeeze it between my fingers to release the therapeutic aroma.
That's what works for me!