If you catch it early, you can use a damp rag to wipe it up. Cleaning it up after it has dried is a little bit more complicated. Many people will suggest paint thinner or mineral spirits, but they are fairly caustic chemicals. The fumes from paint thinner alone are quite dangerous.
It is a tricky task to remove paint from plastic. While it may be easy to strip paint from metal, wood, or ceramic, plastic requires more careful attention to keep the material intact. There are solvents out there that will easily damage or even melt plastic, so make sure to use plastic-safe paint removal products or methods like these. Using a scraper may remove the paint from a plastic product but not all the time. For this, a plastic putty knife or a razor blade would be suitable. With either scraper, however, make sure not to apply too much pressure or you run the risk of scratching up the surface while trying to get rid of the paint.
Paint settles and dries fast on whatever surface it is spilled. It cannot be removed easily with just soap and water and when you are dealing with wooden floor or furniture. Special care should be taken to not ruin the finish of the wooden surface. Denatured alcohol methylated spirits are some common household remedies for cleaning paint stains, though they may not work always. If the paint stains are too strong to be removed by alcoholic solvents then you need a commercial paint solvent or thinner product that is specially formulated for lifting out paint stains.
Image credit: SuperMrRudolf, Pixabay. Paint sprayers make life a lot easier. And, a lot messier. After the end of a long day at work with the sprayer, you will inevitably be covered in paint.