Before I began to sketch, I started to list the features i want to be in my Project, it will help you to set many things about the design.
The Ergonomics of the device was my first concern in the designing, so as my device look a lot like the Pen, I started to search for the Ergonomic features of the pen
I began sketching with my hand, but i decided to sketch using the Wacom as a training for my self, i used Sketchbook application for mac. It wasn't that easy at the beginning but I did it in the end
After that I used Photoshop to add some effects to the sketch