Security Awareness - Best Ways

[WALI <hkhasgiwale () gmail com>]

If I had to undertake awareness training for about 1200 employees of my 
company and the maximum seating capacity in the largest of the halls is 
that of 20, going by that it would take a year to complete them all. How 
should I start? I can't conduct training everyday as I have other things to 
do but conducting awareness trainings is also part of job profile.

I have about a dozen departments and each department is having an approx of 
80-90 guys. I have created a website but would newsletters/links etc would 
suffice.

Any other ideas to reach the broadest of spectrum?