Where do I learn about countering my ADD-like behavior?

I’m a one-man design shop for past 7 years, and my bad habits are holding me back. I find tactical excuses not to do the difficult strategic work needed to grow the business. Although I’ve read and have understood many articles about things a business owner needs to do, I’m not progressing. It feels like an attitude or mindset problem and it’s frustrating, as is finding help beyond “just do it.”