I got one of these bad boys to grind out the juice:

https://www.amazon.com/Handy-Pantry-HJ-Hurricane-Wheatgrass/dp/B000E7L2K6/ref=sr_1_1?s=kitchen&ie=UTF8&qid=1528743364&sr=1-1

But then my sister was saying the act of chewing helps your body synthesize the nutrients better; so I'd take a handful of wheatgrass, chew for a while like a cow, and spit out the leftover solids.

I grew them in trays that I drilled holes in the bottom so I could thoroughly wash and drain it. I've also successfully grown it with and without soil. Some people recommend soil or a grow medium just because it's closer to nature.