Amen, I agree with all of the safety stuff.
Something I like to do is keep a couple of wound trimmer head spools in my toolbox. That way if I run out of string mid property I can be back to trimming in just a few moments and I don't have to stand in the heat and try to wind all that string.
Also, I made a little sign to go on all my mowers that says "DON'T DO ANYTHING STUPID." It may sound silly but when you see it six or seven hours a day it does kind of sink in.
Are we having fun yet????