I don’t need to do much photocopying these days, as my trips to the library are rather infrequent. However, if do venture that way I bring along my compact digital camera. I used to have a 3 megapixel camera phone, but darn it, lost it, so its my trusty casio instead, and avoid those long photocopying queues. Rather than photocopying chapters or journal articles, I now just photograph them. Its free of charge, its quicker, I don’t have to find a photocopier, and I end up with a digital copy which I can read on my computer. print, or even run OCR if I was so inclined.
I set the camera to 2 megapixel resolution, which is 1600×1200 pixels. You might want to try lower that if you are concerned about storage space. Find yourself a well lit area, and switch off flash. My camera has a “best shot” text mode, but if yours doesn’t you might be able to simulate it by increasing the contrast, but you can manage without it. You might want to use black and white if you don’t need to capture colour diagrams and photos. Switch on macro mode or use autofocus. Switching off flash and using manual focus/macro mode means it is much quicker to take pictures. Try to be consistent with the distance you hold the camera above what you are copying. I use my fingers at the bottom of the book spine to keep the pages held down and reasonably flat. It means that a depending how you frame the shot you end up with photos with fingers at the bottom but I can live with that. Take a test shot and use the zoom mode to preview the text to make sure it is clear and not blurry. Then, shoot away. Once you get into a rhythm of page turning and camera shuttering you can do this quite quickly.
I then upload the photos to a folder on my computer with the name of the book, and do a batch rename of the jpegs. If you have Adobe Writer (and perhaps other software does this) you can combine the photos together into a single PDF.
If I have a library book at home I can use a tripod to get a more stable consistent shot, and the process becomes even quicker.