Where would you recommend getting stickers and charms for my 3DSXL?

I see so many people decorating their 3DS' and they all look so amazing, and I'd like to do the same with my own. I'm just stuck on what kinds of stickers/charms to get and where to find them (I have a few themed ideas in mind). Could anyone recommend where to get stickers in bulk and/or charms/stylus leashes relatively easily?