For example, just between the thumb and index finger is a spot that, when rubbed in a circular motion, can get rid of headaches. The feet are notorious for just such spots. They're simply items that enhance relaxation, either directly or indirectly. Candles are a good example. Aromatherapy candles have been known to aid in the relief of tension, though lightly scented votive candles, which are just pleasant smelling, may achieve the same thing.
Candles also do wonders for mood lighting by creating a soft, relaxing glow.
Another example is massage oil. These lightly scented mineral oils aid in making the hands flow smoothly and create less friction on the skin. Many of them also have beneficial effects on skin. Other tools such as masks can be frozen to reduce eye puffiness, and alleviate tension or sinus headaches. Pads that can be microwaved or plugged in can be used to loosen stiff muscles, as can a long hot bath.