Something to watch out for is that sometimes, all the planning and brainstorming may lead to a spiral of adjustments and perfecting-process and you never actually get to the "doing" part; so it's important to remember that you have to actually start at one point. Often, certain ideas and realizations don't come until you are actually working on the canvas.
Adequate planning is essential of course, needless to say. But too much may lead to vaporization.
Adequate planning is essential of course, needless to say. But too much may lead to vaporization.