Stat: what goes into the world's best sangria?

[Jackalope]

Depends on whether you're using red or white.

With white, I like sliced citrus and juice with something to put some bubbles into it; soda water, Sprite etc will work according to your taste.

Come to think of it, I do something similar with red, though I'll throw in some pomegranate juice as well.

Taste as you go - easy there cowboy - and you'll do fine.