My skeleton Jade file

_layout.jade

!!! 5
html(lang='ja-JP')
  head
    meta(charset='UTF-8')
    meta(http-equiv='X-UA-Compatible', content='IE=edge,chrome=1')
    block head-title
    meta(name='viewport', content='width=device-width')
    meta(name='author', content='Yu Inao')
    meta(name='rights-standard', content='pd')
    block head-meta
    link(rel='stylesheet', href='//cdnjs.cloudflare.com/ajax/libs/normalize/2.0.1/normalize.css')
    block head-style
    script(src='//cdnjs.cloudflare.com/ajax/libs/modernizr/2.6.2/modernizr.min.js', charset='UTF-8')
  body
    block body-content

    script(src='//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js', charset='UTF-8')
    script(src='//cdnjs.cloudflare.com/ajax/libs/lodash.js/1.0.0-rc.3/lodash.min.js', charset='UTF-8')
    script(src='//cdnjs.cloudflare.com/ajax/libs/backbone.js/0.9.9/backbone-min.js', charset='UTF-8')
    block body-script

index.jade

extends _layout

block head-title
  title gist-skel-jade

block head-meta
  meta(name='keywords', content='key1,key2,key3')
  meta(name='description', content='Description of this page')

block head-style
  link(rel='stylesheet', href='./css/index.min.css')
  //
    [if IE]>
    link(rel='stylesheet', href='./css/iefix.min.css')
    <![endif]

block body-content
  section
    h1 gist-skel-jade

block body-script
  script(src='./js/index.min.js', charset='UTF-8')
  script
    var _gaq=[['_setAccount','UA-XXXXX-X'],['_trackPageview']];
    (function(d,t){var g=d.createElement(t),s=d.getElementsByTagName(t)[0];
    g.src=('https:'==location.protocol?'//ssl':'//www')+'.google-analytics.com/ga.js';
    s.parentNode.insertBefore(g,s)}(document,'script'));