Here is the basic formula I use for my green juice now:
Makes about 1 quart
1 small bunch or 1/2 large bunch celery
1/4 - 1/2 pound dark leafy greens (kale, collards, swiss chard, spinach)
1 cup of water
1 apple (optional for flavor)
juice of a lemon or lime (optional for flavor)
a small piece of ginger (optional I like the smell and makes me happy)
I use a blender. I put this stuff into the blender with the juicier items on the bottom to help the blades move easier. I mix it and then puree it until it's pretty smooth and blended, no large specks of greens floating around.
Then I'll pour it into a bowl I have lined with a nut milk bag or a paint strainer bag. I gently massage the bag to get the juice out. Then I pour it into a quart jar or glass and drink. :)
SPECIAL NOTES: I make sure and mix up the greens so I don't overdose on just one type - especially the spinach. You don't want to be eating a whole lot of spinach regularly it has oxalates that can be harmful in large amounts.
If I have all organic items, I wash well but don't peel anything. I also will sometimes fill my glass 1/4 of the way with some of the mix with the pulp in it and then strain the rest. This way I get some fiber and something to "chew."
However, if it's not organic stuff, I make sure and peel stuff that has a waxy coating. And I strain the whole thing. I hear pesticides and toxins reside in the fiber - kind of magnetically attracted to it. So I strain it out and get rid of it on non-organic stuff. My budget varies, so I try to get organic when I can.