How can I train my 10 month old border collie to stop jumping on guests when they arrive?

To train your 10-month-old border collie to stop jumping on guests, you can use positive reinforcement techniques such as rewarding good behavior with treats or praise. Consistently ignore and redirect your dog's jumping behavior, and teach them a command like "sit" to greet guests calmly. With patience and consistency, your border collie can learn to greet guests politely.