What you're talking about is having things on your website people can read and use that automatically update themselves, right? You don't have to do anything after you've added them in?
Those are called "channels" and if you Google search the internet for channels, you'll get a lot of info.
For instance, here is a Free Horoscope channel you can add...the page includes specific instruction on adding the code needed into your site to get it working:
Horoscope Content from Horoscope.com
Now just decide what other kinds of channels you want and search for people providing that service.
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