I don't really follow recipes anymore, as I've gotten addicted to this method (from: here)
3 parts grassy greens juice
4 parts sweet juice
2 parts zesty/sour/tart juice
1 part spicy juice

Example:
3 parts romaine/spinach/cucumber juice
4 parts apple or pear juice
2 parts kiwi or lemon juice
1 part ginger

-- gnat!