1) This is stock. That means: don't ask me before you use it; and for the love of all that is holy, please, BE CREATIVE with it! Don't just change the colors or whatever.
2) Credit me on the finished piece. I would prefer both a link to my main page (either :devfoxy-stock: or :iconfoxy-stock:, I don't care which), and a link to the specific piece or pieces of stock used. (FAQ #81: How can I make links to other deviants, deviations, or websites?)
3) Send me a note containing a link to the finished piece. If you send me the link any other way, I might not get it. I will visit your piece, I will comment, and I will favorite it. I may not always do it in a timely fashion, but I'm trying harder to do so now that I have a computer with internet generally available to me again.
4) Talk to me about anything further (off-site usage, prints, requests, etc.). I am generally open to such things, but I want to know about it ahead of time.