Sitting in a coffee shop with tunes from my favorite “zone out” playlist playing through my headphones, I sketch away in my graph composition book. I am loving life. Sketching is an absolute must. This pencil and paper record of all the ideas is a visual record of the evolution in my design thinking. Concept discovery is such an important stage for your development. You avoid a lot of future frustration by putting in as much work as possible in your sketchbook.