Like performing dental work with a ballpoint pen or greeting your father-in-law, golf requires a steady hand and a wealth of patience. Become a master of golf tools with today’s Groupon: for $39, you get a 30-minute swing evaluation at GolfTEC in North Bethesda (a $99 value).

GolfTEC's swing-improving methods claim a 95% success rate from more than 200,000 clients. During one of the center's most popular services, resident experts conduct a comprehensive swing analysis, pinpointing swing flaws and testing your tolerance for mid-swing tickling. The 30-minute evaluation employs video, motion measurement, and computers that have sworn allegiance to the Three Laws of golfing robotics to eliminate human errors. After the analysis, a PGA-certified coach will create a personal improvement plan to tweak each step of your orb attack, providing a step-by-step guide to walking the hazardous path to better golf.