Nothing special, just personal scripts that I use. Uploaded here for version control, and to force me to document my code.
Example directory ~/bin
export PATH=$PATH:~/bin
To have it permanently, edit .profile (bash) or .zshrc (zsh)
Example directory C:\Users\Choochoo\bin
PS > $env:Path += ";C:\Users\Choochoo\bin"
Alternative way - docs.microsoft.com