I'm not going to sit here and pretend that reddit doesn't have some great features, this being one of my favorites.

The ones I use the most:

• A for upvote
• Z for downvote
• J to highlight next post
• K to highlight previous post.

Makes browsing very fast. Typically I click through all the links to different tabs and when I return to the homepage tab I use these shortcuts to fly through all of them and vote so I can refresh the page and they all disappear while still having contributed.