Here are the steps which i feel is good
1)Read Debu panda (EJB 3.0 in Action) ,gives overall good view of EJB3
2)Read OREILLY book along with
JBOSS (for practical purpose ) as examples
are for JBOSS
3)Go through EJB3.0 core specifications,
4)Finally Mikalai notes and mock tests
SCJP(1.4), SCWCD, Oracle 9i SQL certified, Oracle PLSQL Developer Certified Associate