You will need:
Clean Squirt bottle.
70% Isopropyl Alcohol. (or rubbing alcohol)
Clean white rag
Step 1: Vacuum your couch.
Step 2: Spray with alcohol. Wipe on Wipe off.
Taking your clean rag scrub the stains, you should notice them getting lighter and the rag getting darker with dirt, Move your rag to a clean area and repeat until you no longer see dirt appear on the rag.
Then move on to the next area.
Work from one end of the couch, head to foot, to the other end. The alcohol will dry in 30 min to 45 min. If you still see some of the stain, or the "hard edged" of the halo from spilled juice, then go back and repeat that area only.
Step 3: Bristle the fibers back in place.
I got this idea from Chris and Robin's blog