[Dux-X-Bellorum]

I was wondering what site works best for ordering sticker sheets. I've heard of zazzle and I've heard vistaprint does stickers but I'm not too sure about those places. Could someone possibly tell me what site is best for stickers?

Or perhaps a good quality way to do it yourself?

[Kikai]

It depends! Are you cutting out the stickers and selling individually selling the stickers as a page?

For cut out stickers I honestly just bought a pack of sticker paper from Office Depot, or some similar store. If you have a nice quality printer they work great, or you could ask the place you bought them from to print for you, and then just cut them out from there. It's a relatively cheap way of doing it and still look high quality (Unless you are looking for vinyl or shiny stickers)

[IcyPanther]

I have used Zap Creatives for stickers twice and I've been very pleased with their quality.
Their counting skills, not so much. If you do order from them, make sure to order well in advance because (at least for me thus far) they have very badly messed up the sticker counts and I've had to wait for them to ship the correct amount back out.
But the quality is really good. The only downside is to get a decent price you need to order a larger bulk order. If you only wanted to do a few stickers, then the sticker paper might be your best bet!