Like garden weeds, nails continue to grow no matter how frequently you nibble on them. Tend your digital plots with this Groupon. $19 for Shellac Manicure, Signature Pedicure, or Spa Mani-Pedi (Up to $39 Value) During the Shellac manicure, nails undergo a soak, trim, and shaping before Shellac drapes on its no-nick, high-shine coat that typically wears up to 14 days. Alternatively, clients lounge in cushy massaging chairs while feet steep in a warm bath to prep for their signature spa pedicure, during which a licensed tech applies a callus-removal cream wrap and deftly trims, shapes, and polishes nails. The spa mani-pedi is a basic nail service that includes a soak, cuticle trim, massage, hot-towel treatment, and polish.