best stain remover?

Brittany

So, I've got A LOT of white baby clothes for my baby due in July. I'm worried about poop stains or spit up stains on all these white clothes. So what's the best stain remover or whatever? What kind of advice can you give me? I probably shouldn't have bought white clothes, but the gender is a surprise and I got the clothes at a second hand store so it's the best I could find.