Honestly, I'm not going to make this hard for anyone, because I really don't like the idea of restricting my work any more than I have to.  

Here's what you MUST do to use my stock:
There's not anything...   

Here's what you CAN'T do:
Claim any of my stock as your own
Put this stock into a bundle or on a website that charges money for its use

Here's what you can do if you feel like it:
Give me credit when/if you post your art somewhere
Comment or message me with a link to your completed work
As incentive to share your completed projects with me, I promise to any DA art featuring my stock.  I will also create a journal entry to promote uses of my stock outside of DA.  

For Commercial Users!!!  Please read!!!

So, due to the suspicion that I have misunderstood the CC license I chose, I had to go through and make EVERYTHING in my gallery "For non-commercial use" only.  However, never fear!  Here are the rules for those of you interested in using my textures commercially.

If you have used my stock to create an original piece of art, you are MORE THAN welcome to sell that art commercially.  I WILL NOT hunt you down for it, I promise.  
You may use my stock to create backgrounds, buttons, banners, images, etc for commercial websites.  In this situation, I would especially appreciate a link back to my gallery somewhere on the site...but again, it's not required.
You may use my stock to create promotional materials for your musical group - this includes t-shirts, CD covers, posters, brochures...and just about anything else.  
ANY OTHER commercial use of my stock MUST be discussed with me first.  Please don't be afraid to ask - I don't bite.  

See, wasn't that easy?  Have fun with the stock!  

Also, please note, most of my scans are VERY hi-res, so the best way to see what you're getting is to download them and get a good, close-up look.