Managing Anger: Slow Progress is Still Progress

I've made self-help progress slowly and I'm honestly amazed. I fall victim to my own anger triggered by very simple inconveniences multiple times a day, always have. But lately, without working on it in therapy, I've been more successful at catching myself and taking a deep breath with my eyes closed. I focus on calming down before I open my eyes and continue what I was doing calmly. As an example, I am very disorganised and sometimes searching for things really makes me mad. So, I take a deep breath and calm down before I keep searching and I find what I was looking for easily. Then I have to tell myself that it's not a big deal that it took me so long or caused me stress because it's over now and I can move past it. THAT part requires a lot more energy. But it's working slowly~