CSS-Tricks – “is a website about websites. Tips, Tricks, and Techniques on using Cascading Style Sheets.” This newsletter is focused on CSS of course. Their newsletters give you links to projects on CodePen, great information on design and development, analytics, backend stuff, tutorials, and links to other information. They also have a really good blog that you should check out. This is a must-have for anyone that works with the internet and is a personal favorite.