Automate the rote software engineering so it's built upon a shared, healthy, secure, etc codebase... Leaving only the harder, more-fun 1% for us to noodle on instead.
I might start with a simple for loop:
for(int i = 0; i < limit; i++){
...
}
for(int i: [0 .. limit]){
...
}
for(int i = 1; i < limit; i <<= 1){
...
}