Here are some useful links about X-ray crystallography. 

a) How to grow good crystals:
        1- https://www.nottingham.ac.uk/~pczajb2/growcrys.htm

        2- Grow Crystals 1

        3- Grow Crystals 2

        4- Growing and Mounting Crystals Your Instrument Will Treasure

        5- Growing Crystals That Will Make Your Crystallographer Happy

b) Editting a CIF file:
        1- How to handle CIF file!

        2- http://checkcif.iucr.org/

c) X-Ray Crystallography Software:
        1- ORTEP 

        2- MERCURY

        3- PLATON

        4SHELXL User Guide