1. If you have just spilled red wine, immediately pour white wine over a red wine stain. The white wine [white grape juice is fine too] dilutes the pigmentation from the red grape.
2. You can also put salt on the stained area, wait a few minutes and rinse with running water. If you have an old stain, try soaking the stain with a lemon-water or vinegar-water solution, then wash it with your other laundry items. Of course, we’re talking about treating clothing not carpeting or furniture fabric.
The more expensive the item affected, the more likely you will seek professional cleaning care to resolve the problem even if you do emergency management. Not everyone feels comfortable with treating red wine spills, but doing nothing can cause the stain to set making it virtually impossible to get rid of later.