Template
For many years I've kept a collection of pieces of shell code that I end up using when I start a new script. At one point I had to create about ten scripts in the same day, and realized that for each script I was copying a basic getopts loop, then copying the set_x function, then copying the coloured line functions, and realized that it would be easier if I had a "template" with these things already in place, so I started a template.txt file in my home directory.
A few months later I discovered the cheat program, and stored the template as a cheatsheet. When I start a new script, I type something like this:
cheat template > new-script
... and then edit the new-script file from there.
Download
My cheatsheet collection is backed up to Github. You can download the template cheatsheet from this link.