If you're ever interested in reading a novel with some great ways to view the craft of magic, I recommend reading the Dresden series. Most specifically, Dead Beat if you like the necromancy side of things. There was a great description of how to "gather" the energy of death - by seeing all the death around us on the small scale. When you think about it, there are aspects of death all around us - skin cells, insects, small animals, plants, etc.
Magic always seems to be made too simple by most folks... I like it a bit more when using magic takes something out of you. Forcing the energies around you to bend to your will should never be an trivial thing.