In a single player tournament, if you take too many shots you can just exit the tournament to the main menu. Then go to "Single Player", "Continue Tournament" and you will restart that hole without compromising your score. Just retry that hole until you are satisfied with your score.

Look in the indicated location to find the corresponding medal.

MedalLocation where to look
Explorers Outer Space Medal #3	In Tubular, get your ball next to the flag. Then, hit it into the corner closest to the flag. The ball will enter a tube and land on the medal.
Explorers Outer Space Medal #4	In Space Bar, the medal is found behind the red tube in front of you.
Explorers The Carnival Medal #3	In Bump n' Run, hit the ball hard to get it past the hole. The medal is at the end of the trail.
Explorers The Carnival Medal #4	In Rolling Tube, hit the ball down to be level with the hole. Then, knock it up the ramp.
Explorers The Old West Medal #3	In Dead Man's Creek, look behind the stump directly ahead to find the medal.
Explorers The Old West Medal #4	In Water Tower, hit the ball into the pipe directly ahead. The medal is hidden in the pipe.
Travelers Outer Space Medal #1	In Teleporter, hit the ball into the purple container to bounce it on to the medal.
Travelers Outer Space Medal #2	In Rocket Man, hit the ball on the crater directly below the medal.
Travelers The Carnival Medal #1	In Skeeball, hit the ball directly between the two little holes and above the large hole.
Travelers The Carnival Medal #2	In Spinner, hit the ball into the spinning cup so that it spits your ball down the left side. When it exits, it will bounce down the stairs.
Travelers The Old West Medal #1	In Graveyard Shift before taking your first shot, look directly to your right to find the medal.
Travelers The Old West Medal #2	In Barrel Blast, look directly behind the shack that is directly ahead to find the medal.