It is noticeable that goalkeepers, while being specialists, are not often trained specifically.
Standing a lad in goal for a training match is the least effective way of coaching a goalkeeper.
Considering all the skills needed to be a good keeper - their hour of training should involved 45mins of GK specific drills. I find it amazing how many intercounty goalkeepers haven't mastered a range of kick out options
Knuckleball: A shot with almost zero rotation, hit with the laces to create an unpredictable, swerving, and dipping trajectory. It is difficult to master but hard for fielders to track. A good option when under the cosh at kickout time.
The "Swaz" Curled/Curving goal Kick: A common technique that uses the inside or outside of the boot to create spin, allowing the ball to bend around a pressing attacker. Often used to hit a teammate on the run - into the chest. All the runner needs is a yard of space and he is away.
Dipping Goal Kick: A shot designed to rise quickly and then rapidly descend ("dip") over the pressing attacker and into the stomach of a defender on the run, often achieved through top spin. A Stephen Cluxton Special.
Driven/Power Shot: A high-speed, direct strike aimed with maximum force, typically using the laces, often used to hit the opposition 45. Shaun Patton special
Trivela (Outside Foot): A shot hit with the outside of the boot, causing the ball to curve away from the goalkeeper. A fast disguised short kick option.
The "Ping" (Lofted/Long Ball): A high, long ball that drops onto the midfielder's head. One for the "Fear Laidir" to catch and the opposition to punch back at you.
The Short/Build-up Kick: Used to maintain possession and play out from the back.
Being able to do each of them with either foot and a shortened run up - a lot of kicks needed. Plenty to be at rather than standing waiting around. Especially when you now need to take 35-40 kick outs per match - so need to be kicking a ball every 2 mins.