I've got the same issue actually - I've been thinking of using Postach.io as a way to collect random musings and photos of text in books I'm reading / pondering.
Evernote is perfect for using as a commonplace book [1] for exactly this purpose. The only drawback is that it's hard to view in a chronological order, which is a key part of the commonplacing idea. Seems like a blog platform on top of it could solve this right away.
Now I just need to get around to reading those books I want to excerpt from...
Now I just need to get around to reading those books I want to excerpt from...
[1] http://en.wikipedia.org/wiki/Commonplacing