Safety first is safety always.
Keep safety in mind. It will save your behind.
Do not depend on others for safety — Help yourself.
Safety is not a choice at all - that implies that people who are injured chose to get hurt or that all fatalities are suicides!! That's why we call it an accident. If you are really keen to understand more about this then please read http://www.safetyrisk.net/safety-is-not-just-a-choice/
I wish Safety would grow up and become more intelligent. You cant save people just by putting up a silly slogan - in fact you increase the risk by confirming safety as a boring joke. Why dont we put stupid aphorisms up at home or when we are with friends? Because we know how to have intelligent conversation with them but we are treated like dumb robots at work. Safety needs to understand more about human psychology and the deep unconscious reasons why people make the seemingly irrational or counter-intuitive decisions they do - sorry but Safety has no idea! See this one then: http://www.safetyrisk.net/safety-slogans-dont-save-lives/