Every freelance writer in the internet and every pro-blogger will have their own favorite resource for writing an article or a blog post on a daily basis.
Without a resource to look up for salient points on a subject, it is not possible for evert to continue blogging.
I have compiled a huge database of writers' resources. Ask me for any topic and I will be able to guide you to the best resource.
My favorite resource is Zemata because, several times, it gave me my own earlier articles published elsewhere in the Internet.