how to start prepration, what are the steps,
That depends on how familiar with
Java.. if you know the basics of Java and are comfortable writing simple programs pick up a copy of SCJP book by Kathy Sierra and Bert Bates and start studying , it is the best book for the exam and covers everything you need to know
If you are completely new to Java pick up a copy of Head First Java and start studying from it..
for furthur info see
this faq
The significant problems we face cannot be solved by the same level of thinking which created them – Einstein
SCJP 1.5, SCWCD, SCBCD in the making