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Tiger Woods has Sean Foley; Phil Mickelson has Butch Harmon. Every golfer can benefit from a teacher – someone to offer insight and criticism, provide another set of eyes and a bit of perspective. While most golfers are happy to buy themselves a new wedge or driver they don't need, only a few splurge on instruction that would actually help their game. Lessons bring down scores and raise confidence, making them the best value proposition out there for anyone genuinely rooting for the amateur golfer in their life. [Prices vary; pga.com]