The 10 Most Broken Rules.
1. Giving advice and indicating the line of play. Asking what club a fellow competitor or opponent used, or telling them how to execute a swing is not allowed. Neither is touching the putting surface to indicate the line of play when the player's ball is on the green. You can point to a part of the green, but you cannot touch it with your hand or any kind of object.
2. Dropping from a cart path. Many players feel they can take relief on either side of the path. Actually, the player has no choice. They must drop within one-length of the nearest point of relief, which ever side of the path that is - even if it would mean dropping into an unplayable lie in a hedge or bush. Of course, in this case most golfers would elect to play the ball from off the path.
http://www.youtube.com/watch?v=9Tqz8FYFfIM&feature=related
3. Taking a ball out of a water hazard and dropping it along the "line of flight."
The expression "line of flight" does not exist in the rule book. Golfer frequently will drop a ball along this imaginary line after hitting their ball into a hazard, but such a procedure is not among the options in a water hazard rules. Option (1) Play your next stroke as near as possible from the spot from where you played your last stroke. Option (2) Drop a ball behind the water hazard, keeping the point at which the ball last crossed the margin of the hazard between you and the hole, with no limit to how far back along this line you can go; of if the water hazard is defined a a lateral water hazard you may Option (3) Drop a ball outside the water hazard within tow club lengths of the point where the ball last crossed the margin of the water hazard.
http://www.youtube.com/watch?v=9uByDf9wq-w
4. Improving your lie or position by moving growing things beyond the limit allowed.
You cannot improve (1) the position or lie of your ball, (2) the area of your intended sing or (3) your line of play by moving or bending anything growing or fixed, or moving or pressing anything down with your club. The only exceptions are when you are fairly taking your stance of actually making a stroke. Also you cannot step behind your ball to improve your line, except on the teeing ground.
http://www.findthefairways.com/golftips/201-Rules-and-why-you-can_t-improve-your-lie-.html
5. Tamping down the line of putt.
You are not permitted to remove everything on the line between your ball and the hole. You may repair a ball mark and move loose impediments, but you cannot repair spike marks.
6. Procedure for a lost ball.
Some golfers will drop a ball in the vicinity where they think the ball is lost and add one penalty stroke. When the ball is lost, the player must go back and hit again from the point where he last played a shot, incurring a one-stroke penalty. If you lose your ball on the drive you must return to the tee and are now hitting your 3rd stroke. (Time Saver - My opinion and you could never do this in a tournament or regulated competition: If you do lose your ball while playing a regular friendly round of golf and don't go back to the point where you last hit your ball due to speed of play then you should really count 2 extra strokes. One for the lost ball and another for the distance you gained by not going back. If you wanted to be really nasty you could add another one for the favourable lie you gained when you dropped your new ball.)
7. Taking relief from immovable obstructions. (These are man made items...like a drainage ditch, a yardage marker, sprinkler head, things you can not move, etc.)
A common notion is that golfers are granted two club-lengths from the nearest point of relief in these situations. Actually, you are allowed only one club-length once the nearest point of relief has been determined. (The way I remember this rule is if is relief I am taking then I will not encounter a penalty stroke therefore I only get one-club length, if I have to take a penalty stroke because I am in a bush, up against a tree or something like that then I do get two club-lengths.)
(No penalty stroke = one club=length. Penalty stroke = two club-lengths.)
2 Good Videos explaining this -
http://www.youtube.com/watch?v=dFGA7OpV1GQ&feature=related
http://www.youtube.com/watch?v=d-f-K0GDCHU
8. Playing a Provisional Ball
When a golfer hits a ball from the teeing ground or fairway and feels the ball may be lost of out-of-bounds, they often will play a provisional ball right away. If on the teeing ground they should first wait for their fellow competitor or opponent to play their first shot.
Golfers are often careless about announcing their intention for playing a provisional ball. They might say "I think I'll reload." which does not satisfy the rules. The player should make their intention clear, stating "I'm going to play a provisional ball.," and should also say what ball they are going to play, "Titleist 3 with a red dot". If you do not declare your ball as a provisional then that ball is now the ball that is in play. Your first ball cannot be played even if it is found.
Here is a great video that explains provisional balls. -
http://www.youtube.com/watch?v=VF3CHwZ1iHg&feature=related
9. Procedure for an unplayable lie.
When a ball comes to rest under a large bush some golfers think they are allowed two club lengths from the point of relief determined by the outer edge of the bush. This is wrong - if the player elects this option he must measure two club-lengths from the ball.
10. Undue delay in looking for a lost ball.
Golfers commonly look for a lost ball longer that the five minutes allowed. The timing, however, begins when the golfer starts looking for the ball, not when they hit the shot.