Not enough

Sometimes, I feel like I am not doing enough as a Mother. Like I could do things better. I know I don't have enough patience. I know I need more patience. I wish I knew how I could be more calm and collected. I get frustrated far to easily and find myself yelling at the kids. I know this is stupid, it is not going to help/fix things. It is only going to show them that yelling is what you do when something isn't going right. I don't want my kids to think this. I need to start setting a better example. I just wish I knew how to do it.