One of my most consistently useful Twitter contacts is @brainpicker. I'm often bookmarking links from those tweets. The associated blog, Brain Pickings, is also worth delving through for gems, ideas, inspiration. For example, this entry on Erin Hanson's Need to Want series.
here (source of these images), and the philosophy informing it:
buy prints of these from the artist at her online shop here. (if you can't see the one you want, convo her (that's Etsyspeak for contact via Etsy email)).