Not every newsletter that lands in my mailbox is about writing resources. Sometimes they're about things that I enjoy for their own sake - but since everything is fair game for writing, I try to read them with an eye toward how I could make a story out of something I already like and know about.
If you're a travel writer, you could get ideas from travel magazines - no-brainer, right?
If you write about fashion or trends, I'm sure you've already got your ear to gossip blogs and feeds.
If you write about saving money, you might get ideas from loitering at the thrift shop, subscribing to groups like FreecycleCafe, and browsing the advertisements on Craigslist.
Get the idea? There are plenty of them out there...