Okay, let's contemplate our navel for one moment. If you chose KDP Select when you uploaded your book, you can't put it anywhere else because you agreed to have it exclusively on Amazon. If you didn't, then it means you can put it anywhere. Now, that anywhere would be Smashwords because they distrubte your book to Apple, Sony, Kobo, Barnes & Noble, Diesel, Page Foundry, etc. It's free to join, they take a share of your royalties, but then so does Amazon, and they pay you every quarter via Paypal - simples. You also have to make sure that the cost of your book is the same for all distributors - Amazon take this very seriously!
A couple of other things you might find useful: Join Bookbuzzr to market your books. Now, there's free bit, and a premium bit. Being a mega skinflint, I'm with the free bit. It has these little widgets, and you can automate tweets. What more do you want? Well quite a lot really, because there are millions of books out there- How does a reader find yours? A couple of suggestions: 1) Use Twitter, but be careful not to spam your followers; create a Facebook FanPage - Now, remember the waffle at the end of your book? Put a couple of links in there - one to your fan page, the other to your website. What! You haven't got a website? Try weebly - like most things there's a free bit and a premium bit, I use the free bit. Yeah, I don't care if it shows!
That's it, I'm exhausted. I've probably missed a million things, but my brain's turned to chop suey. If you've got questions, Toady, please ask and I'll try to answer them without incriminating myself.