Training - where did you learn?

Hi,
I currently work as a SQL Server trainer and am considering the
viability of training DB2 in the future. Other IT training companies
generally offer SQL and/or Oracle, but no DB2 so there might be the
market demand. What I would like to know is how did you guys get your
skills, eg:
  courses at IBM
  courses at independant training centres
  self-study
Thanks in advance,
Paul Ibison