Ifit.com allows you to build a workout walk/race/bike route simply by clicking on a Google Maps interface. You can then use a compatible ifit-enabled workout machine to recreate the route automatically. The problem is that the user interface still isn't final, so there are features in place that aren't exactly obvious. For example, if you create a workout your machine starts at 1 MPH, because that's the default. But how to set it to start at say, 3 MPH? Easy, just switch from map view to graph view: That button switches from the Google Maps interface to a chart that allows you to visualize and control effort: You can't change the elevation, this is fixed due to the geography that you selected. But you can drag the yellow (speed line) to change the speed of your device. What if you want to have segments at different speeds? Easy, just click and drag and it will break the line, and you can drag each segment of the line independently: ...
The concept is dead simple: when the pencil is short enough to be a pain to use, plug the next pencil into it. This gives you the right leverage to keep using the pencil until it is truly gone. The sad thing is this is an invention that is at least 10 years too late, unless artists are willing to take the brunt of the increased costs from retooling pencil machines that have not changed in what? 100 years? That said the rest of the developing world is using pencils, and I am sure that using that last couple of inches of pencil is going to save so much that they should probably make these mandatory. 
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