One of the most lucid thinkers is Bob Hoffman, (link: http://adcontrarian.blogspot.com/2016/09/the-devaluation-of-creativity.html text: The Ad Contrarian).
Erin Eby
Partner
(link: https://www.pinterest.com/ text: Pinterest). I collect images that make me feel something, find what they have in common, distill it, and leverage that in brand work.
James Ferrell
Web Designer
(link: https://twitter.com/ text: Twitter). Tweets are usually not inspiring, but they often contain links to articles at sites like Medium, A List Apart, Smashing, etc.
Carolyn Rodgers
Graphic Designer
(link: http://www.itsnicethat.com/ text: itsnicethat.com) maintains a great mix of the latest in art and design, usually with paired with interesting interviews.
Jake Johnston
Copywriter
(link: http://www.adteachings.com/ text: Ad Teachings) is my current favorite. It aggregates great creative work, resources, and advice in one place. I try to check it every morning.