Windows 8 Pin METAs
Windows 8 allows for adding websites as apps (or maybe "bookmarks" is a better term) to the home screen, much in the vein that iOS allows users to do the same. Like iOS devices, Windows 8 allows users to accomplish this same task using custom META tags embedded within the page HTML:
<meta name="msapplication-TileColor" content="#FF0000" /> <meta name="msapplication-TileImage" content="/windows8-icon.png" />
The image size should be 144x144 and you'll want to define a custom background color with the META tag above. Tags like these are invaluable -- very little HTML to add but a giant convenience to users. Remember that the easier it is to get to your site, the more likely they will come back often!