Ask HN: Best way to install JS?

The SaaSquatches over at Referral SaaSquatch want to know what the best way is to get a JS library installed.

A bunch of companies like us rely on a javascript library being installed as part of the setup process, for example: KissMetrics, Intercom, MixPanel and Olark to name a few.

How do we make installing the javascript library as easy as possible?

Besides providing a copy-paste snippet, good documentation, and follow up emails, is there anything that we're missing? In your experience, what has made installing a javascript library an enjoyable experience?