Media queries you should know about
Transaction patterns for web applications – interesting article with good information.
Must-Have Social Meta Tags for Twitter, Google, Facebook, & More
opendyslexic Font for dyslexic people or anyone in general a good font.
andika nice clear fonts for clean looking text that is easy to read
What You Need to Know About Open Graph Meta Tags for Total Facebook and Twitter Mastery– Very good introduction to the topic, not a long read.
List of all mime types