I had been maintaining engineering notebooks for as long as I can remember. The habit started in college and I just carried the practice through my professional career. However, I alway keep it a point to only write on the right side and leave the left pages for doodles and various notes. I can almost recall what work meeting I was attending for every doodle I put down on paper. The first drawing is from last week's program staff meeting followed by a teleconference with the customer. The bottom two are from some boring training class I was sitting in on -- doodling ornate types was the only thing that kept me awake.