I've been reposting some of my own content that I wrote a few years ago on my blog. Sometimes I'll point out that it was previously published elsewhere, other times I won't.
Either way, it doesn't matter. It's my content and I'll republish it as many times as I want. That's the advantage of creating your own content.
I'll guarantee that anybody who has read what I've written on here has never visited my blog. So I am covering all my bases. You can read my stuff here or over on my other sites. You don't need to do both.