Yeah, pinterest is great. And you're right, I think if I used pinterest, or anything similar, I'd still put everything in one big pile for exactly the reason you mentioned. The random find is usually more valuable than pigeonholing. That said, I do have some small collections that are oriented to more specific interests. Things I just like to look at more regularly, usually because I'm trying to figure them out.
And I'm glad you liked it! I figure this one was mostly obvious stuff, but stuff we all need to be reminded of when we hit a rut, cuz you know it happens.