I have moved a number of times and my library has moved with me. As I have moved boxes were crushed or books slid inside one another and I had a mess on my hands. And some valuable books were damaged. So recently I talked with Charles Mickey, director of the Lanier Theological Library, about the best way to preserve the books that are your tools, if you are a scholar. Take a look at this brief video made by the good folks at the Lanier Theological Library.
Thoughts on the New Testament . . . and Other Stuff by David B Capes
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How to Properly Pack a Box of Books
A Word in Edgewise 
Having moved many times in my life, I have learned to do these very things in packing a box, except I use styrofoam peanuts to fill the gaps in the boxes. Works great.
Good call. Not everyone has those peanuts and some are concerned about the effect of styrofoam on the environment. The great thing about paper is that it is cheap and it decomposes quickly.