When asked for practical golf tips, Tiger Woods always mentions posture. Tiger always stands straight and tall, a decent distance from the ball so that he can keep his chin up. Lots of golfers (including Tiger when he was a beginner) put their address position too close to the golf wholesale ball, and end up having to bow their head down too much. Tiger says to keep a good distance away so you don't have to lean over the ball.
Tiger says that when he's playing his best, everything he does is just second nature. He just goes with the flow, and there's little else involved. That's because he's found just the right groove that suits his natural rhythm. If the rhythm's off, Tiger misses a swing or two. When things are flowing for him, he has to work a little to get it back into a natural rhythm.
Long before he swings for that first hole, Tiger plans the whole game ahead. He prepares himself for the game mentally and emotionally. This involves relaxation, and deciding his game plan beforehand. Perhaps the key to his success is his ability to look at his mistakes and shortcomings, and work to improve them, instead of getting frustrated. This is why his golf tips are so helpful to his fans. When you blow it, think about why you did it. Then, correct it next time, and you'll see improvement.
Tiger Woods uses Nike brand clubs for everything except putting. The putter he uses is a Titleist Scotty Cameron Newport 2(http://www.australiagolfshop.com/wholesale-Titleist-Scotty-Cameron-Studio-Select-Newport-2-Mid-Slant-Putter-159.html), which he has used for many years. He most likely uses prototypes, clubs engineered by Nike specifically for Tiger. So even though these clubs are endorsed by Tiger and he says that he uses them there is no way of knowing what refinements he has had made to them.
About Scotty Cameron Newport 2 Putter: The traditional and timeless design of the Scotty Cameron putter has been expertly refined and updated to produce the high-performance Newport 2. A stainless steel head and interchangeable weight system provide unrivaled stability and balance, and Cherry Dot graphics and overhead sight line help line up precision putts with the utmost accuracy.
The improved high toe profile of Scotty Cameron Newport 2 helps eliminate the tendency to raise the toe at address thereby causing the player to aim left of target, helping the player correctly address the ball and ensure a smooth, linear stroke from any distance. Studio Select also features a stepless shaft for a clean look at address and soft but solid feel, as well as a new red Cameron cord grip.