Throughout my career as a designer, I've always had to come up with ideas rapidly and effectively communicate those ideas to others through hand sketching. This is an invaluable tool for every designer, and one that I often work on. Below are some samples of sketches and concept generation I've done for different projects.
2010 - present
Sketching, concept generation
Concept sketches done for a licensor pitch (top left), animal pop-out business card concepts and the resulting finished product (bottom left), and unfiltered thumbnail sketches from my sketchbook (right).