cheat sheets.

Post current buffer to gist, using default privacy option.
:Gist

Post selected text to gist, using default privacy option. This applies to all
permutations listed below (except multi).
:'<,'>Gist

Create a private gist.
:Gist -p

Create a public gist. (Only relevant if you've set gists to be private by
default.)
:Gist -P

This is only relevant if you've set gists to be private by default; if you get
an empty gist list, try ":Gist --abandon".
Create a gist anonymously.
:Gist -a

Create a gist with all open buffers.
:Gist -m

Edit the gist (you need to have opened the gist buffer first). You can update
the gist with the ":w" command within the gist buffer.
:Gist -e

Edit the gist with name 'foo.js' (you need to have opened the gist buffer
first).
:Gist -e foo.js

Delete the gist (you need to have opened the gist buffer first). Password
authentication is needed.
:Gist -d

Fork the gist (you need to have opened the gist buffer first). Password
authentication is needed.
:Gist -f

Get gist XXXXX.
:Gist XXXXX

Get gist XXXXX and add to clipboard.
:Gist -c XXXXX

List your public gists.
:Gist -l

List gists from user "mattn".
:Gist -l mattn

List all (public and private) of your gists.
:Gist -la