When I am trying to deploy something "README.md and good luck" is always my favourite.

"4. Other" that is welcome and helpful; wikis

A massive honourable mention is devs like #[2] , #[3] , #[4] , #[5] and #[6] (to name just a few) who are active and engage first hand with end users. A bit out of the scope of your question perhaps, but it makes an incredible difference.