Removing coffee stains doesn’t have to be a daunting task. With some quick action and household items, you can tackle these stains effectively on various surfaces. Here are some tips and tricks gathered from various sources:

For Clothing and Fabrics
Act Quickly: The key to removing coffee stains is to act as fast as possible. Gently blot the stain with a paper towel to absorb as much coffee as you can without rubbing the stain into the fabric​​.
Cold Water Rinse: Immediately rinsing the stain under cold running water can help dilute it, making it easier to remove​​.
Household Products: You can use carbonated water as an immediate treatment for coffee stains on clothing. For white clothes, baking powder or baking soda can be effective due to their mild bleaching effect. Salt is another traditional remedy, especially for dried stains. Just wet the stained area, apply salt, and let it sit overnight before washing​​.
Oxidizing Laundry Detergent: For tough stains, treat the area with an oxidizing laundry detergent before washing. Allow the detergent to sit on the stain for at least five minutes before washing the garment in cold water​​.

For Hard Surfaces and Mugs
Baking Soda or Toothpaste: Create a paste using baking soda and water or use toothpaste directly for scrubbing away coffee stains from cups, mugs, or hard surfaces. Gently rub the paste onto the stain with a sponge and rinse thoroughly​​.

For Upholstery
Liquid Laundry Detergent and Vinegar: Mix laundry detergent, vinegar, and water to treat coffee stains on upholstery. Use a microfiber cloth to dab the solution onto the stain, working from the outside edges inward to prevent spreading. Repeat as necessary and allow to air dry​​.

General Tips
Cold Water: Running cold water through the stain can be surprisingly effective, especially if the stain is fresh.
Dish Soap: Good for hard surfaces, dish soap mixed with water can remove coffee stains when scrubbed with a gentle sponge or toothbrush.
Vinegar: Vinegar’s low pH makes it useful for removing coffee stains and odors from clothing. It can be used as a pre-treatment or in conjunction with other cleaning methods​​.
By using these simple and effective methods, you can remove coffee stains from various surfaces without resorting to harsh chemicals. Remember, the quicker you act, the better your chances of completely removing the stain.