When Atlantis fell, the only survivors were its golfers, whose vast knowledge of water hazards saw them to safety. Hone game-saving skills with today's Groupon: for $45, you get two 45-minute private lessons with PGA Master Pro Walter Ostroske at Merrick Road Golf Course (a $110 value).

PGA Master Pro Walter Ostroske—whose extensive resume of golf instruction includes penning the instructional tome Break 100 in 21 Days: A How-To Guide for the Weekend Golfer draws from more than 40 years of teaching experience to help golfletes rein in unreliable swings. In each 45-minute lesson, aspiring aces can pick Walter's argyle-plated brain while honing their skill sets that require the most work, such as learning how to smoothly splash balls out of the practice sand bunker, developing their putt-reading skills at the practice green, or discussing their emotional attachment to the mashie niblick at the driving range. With two private lessons, pupils can reinforce initial teachings, helping to further drive home any subtle adjustments made to their swing. Walter's hard-won nuggets of golf wisdom can hasten players' journey to straighter shots, lower scores, and more dispirited co-competitors regardless of age or experience.