Safety training

A brief post for a busy time:  For various reasons, I'm interested in lab safety training of grad students (and postdocs and undergrads) at universities.  In particular, I am curious about best practices - approaches that are not invasive, burdensome, or one-size-fits-all, but never the less actually improve the safety of researchers.  If you think your institution does this particularly well, please post in the comments about what they do and why, or drop me an email.  Thanks.