We all know of instruments that can measure the calories you burn out, but what if an instrument was invented which would calculate the calories you're taking in through all that you eat and drink through out the day. You could then decide whether you go light on dinner or just skip it! The thing to work on now is to figure out on to which part of the body should the instrument be attached and the system it would use to calculate.

How about getting cars manufactured with the air cooling system attached to a perforated steering wheel. As you turn the A/C on, cool air would blow out of the perforated holes. Would give you sweat free palms and a comfortable long drive in summer. I don't know if expensive cars have that, haven't seen it yet. But the idea in itself is inexpensive.

The idea is to have the driver's corner of the car (between the side window and front screen ) transparent. Would help a lot in enhancing visibility while driving in narrow roads especially with curves or mountain driving. While I drove through mountain roads, I found myself shuffling forward and backward to enhance the visibility, especially while turning. Car manufacturers could create an attractive looking front and add the "enhanced visibility" factor in their marketing.