3 hours is a lot of work if done without distraction. I think the key is to make your work more mechanical and less creative.
I have a system that I have perfected over the years which helps me do this[1]. It's like a stupid step by step list where each item links to a document which is another stupid step by step list that I follow like a "Robot" for these 3 hours. When you do it this way, it makes it quite easy and 3 hours daily is more than enough to launch a small to medium size project in a month (I think there are less than 200 items in total and about 50% of it you can easily outsource).
