Different Parenting Technique

I tend to be a bit on the grouchy side when it comes to my kids and them not minding. Yesterday I went in to Christopher's room while he was outside playing. I saw a big pile of clothes on the floor. They were clothes that I had just folded and sent him up to put away. He told me he put them away. He dumped them on the floor. Now, normally I would scream at him to get inside then scold him the whole time he was putting them away. This time for some reason, I just wasn't that upset. I gently called him in and directed him in putting them away. Then had him pick up all the dirty clothes and sort them in the laundry. When he was finished, I took his face in my hand and calmly told him that he didn't mind and that he lied to me. I said, please don't do that again. He looked at me and said "ok". Then he proceeded to hug me and tell me he loves me. It was so sweet. I think, he is much more likely to do what he is supposed to next time. He definitely does not respond to the yelling. I don't know why I'm so quick to anger with them. I sure love my kids.