1. Artificial sweetener
If you are out to dinner at a restaurant, or even if grease splatters on you while you are cooking, use artificial sweetener immediately to blot the stain. The fine powder will absorb the oil. You may have to keep blotting and using more sweetener, but it really works! And artificial sweetener is always handy at any eatery.
To remove ink stains from colored clothes, an overnight milk bath will often do the trick. Just soak the affected garment in milk overnight and launder as usual the next day.