Check out this Chemistry World review by Karen McLuskey of Crystals, x-rays and proteins. Comprehensive protein crystallography by Dennis Sherwood and Jon Cooper
http://www.rsc.org/chemistryworld/Issues/2011/March/Reviews/ProteinsAndCrystals.asp
A useful guide to the fundamentals of protein crystallography!
Other interesting articles:
Small temperature oscillations promote protein crystallization
Cecília Ferreira, Rosa Crespo, Pedro Miguel Martins, Luís Gales, Fernando Rocha and Ana Margarida Damas. CrystEngComm, 2011, 13, 3051-3056
Crystal engineering: origins, early adventures and some current trends
John Meurig Thomas. CrystEngComm, 2011, 13, 4304-4306