Let your best friend know how much you value her friendship by inviting her along for a relaxing afternoon at the spa. Treat her to her favorite relaxation treatment or a hot stone massage. Imagine how great she’ll feel when the massage therapist places warm stones of smooth volcanic rock on her tired back, shoulders, and neck muscles. If there’s been any friction between you, a spa day can ease that as well. Go ahead and book that appointment! Invest some time and cost in your friendship—a happy relationship with your best friend is worth every penny.