I keep my nugs in a glass jar so its nice and airtight.
As for my stash items, I took the books out of my Goosebumps book package leaving the box empty and I just put random shit in there. I placed the box in the back of my bookcase behind other books so unless you were trying to read Goosebumps you would never find it. I found a picture of it for those who are having trouble visualizing it
http://www.fantasticfiction.co.uk/images/c0/c3992.jpg