A big one I've seen is taking practice throws, but not in the fashion you'd think, because any disc thrown over 5 feet or in the putting zone is a stroke, so if you go mark your lie, then turn and toss the disc back to your bag, its supposed to be a stroke, its looked over a lot though.
The distance is 2 meters. Definition of a practice throw below along with the penalty. There is no warning. You throw the shot and it counts.
Practice throw..During a round,
the projection of a disc of a distance greater than two meters, or of any distance toward a target, intentional or not, which does not change the player's lie, either because it did not occur from the teeing area or the lie, or because the player had already thrown competitively from the teeing area or the lie. Throws that are re-thrown in accordance with the rules are not practice throws. Provisional throws made pursuant to 803.01 C and 803.01 D (3) are not practice throws. A player shall receive a penalty for a practice throw in accordance with sections 803.01 B or 804.02 A (2).
803.01B. Practice Throws. A player who throws a practice throw or an extra throw with any disc any time after the start of his or her round and prior to his or her finishing the last hole of the round (except for throws that must be re-thrown in accordance with the rules, provisional throws made pursuant to 803.01 C and 803.01 D (3), or throws during a suspension or postponement of play) shall receive one penalty throw. The practice throw or extra throw must be observed by any two players or an official.