"Always treat light weight like it's heavy, and you'll be okay."
This little gem is from my friend Dave Tate. Unfortunately, he only shared it with me after I managed to "fuck myself up but good." This is not his fault. It's mine. It's my fault because I didn't train today. I worked out. When I train, I'm serious. When I work out, I'm not. I half-assed something I should have been paying more attention to, and I ended up tearing something that doesn't enjoy being torn. And now I have to rehab the fucking thing for at least a week or two before I'll be back to normal.
The moral of the story? Pay attention to what the fuck you're doing.
Getting "old" sucks the cock.