Simple run

curl -sSL https://gist.githubusercontent.com/Szkered/11019077/raw/b928154e965cd03e9a6abea480026874688aea4a/install.sh | bash

After installation, launch Emacs twice. The first launch will setup el-get, and the second launch will install all the dependencies.

To install new package, add the name of the package into the dependency list located in emacs/init.el

(setq
 my:el-get-packages
 '(el-get				; el-get is self-hosting
   .
   .
   .
 ;; -> add package here!
))

To lookup available packages, run M-x el-get-package-menu-revert