Open source code of this file and copy next chapter into issue of your project. Enjoy!

• Check responsive design for typical resolutions (320, 480, 1024, 1600, 2k)
• Viewport meta tag
• X-UA-Compatible meta tag ¹
• Format detection meta tags ²
• Page 404
• Page 5xx
• Print version
• Noscript version
• Proper cache for all static files
• Apple-specific meta tags
• All absolute pathes without protocol

• Favicon 16x16, 32x32 ³
• Apple icons ⁴
• Android icons ⁵
• Support retina displays
• Sprites and icon fonts
• Minify all images with Imagemin
• Image inlining (for instance in Stylus)

• robots.txt
• humans.txt
• Mark up content with microdata
• Social likes buttons
• Common meta tags ⁶
• Facebook OG meta tags
• Twitter cards meta tags
• GA and other statistic
• Google webmasters

• Google PageSpeed tools
• HTML validation
• CSS validation
• Link checker

• Deploy task for build system
• Code style (jshint, jscs) for JavaScript code
• Autoprefixer for all styles
• Don't save builds in project's VCS
• Check project's deployment (all stuff must be in config files: package.json, bower.json)
• npm test required

^{[1] X-UA-Compatible}

<meta http-equiv="X-UA-Compatible" content="IE=edge">

^{[2] Format detection}

<meta name="format-detection" content="telephone=no"/>
<meta name="format-detection" content="address=no"/>

^{[3] Favicon}

<link rel="shortcut icon" type="image/x-icon" href="path/to/icon.ico"/>

^{[4] Apple icons}

<link rel="apple-touch-icon" href="57x57.png">
<link rel="apple-touch-icon" href="72x72.png" sizes="72x72">
<link rel="apple-touch-icon" href="114x114.png" sizes="114x114">
<link rel="apple-touch-startup-image" href="57x57.png">

^{[5] Android icons}

<link rel="icon" sizes="192x192" href="nice-highres.png">
<link rel="icon" sizes="128x128" href="niceicon.png">

^{[6] Common meta tags}

<meta name="description" content="" />
<meta name="keywords" content="" />
<meta name="author" content="" />
<meta name="copyright" content="" />