I have to agree with mands. The more I stretch pre workout the less control I have over the lift... I used to stretch out my shoulders with cables, do some light flys and push ups before benching and experience shoulder pain. Now I just do a dozen explosive bar only benches, 10 paused benches at 135 and get right into programming that is laid out. The wendler 5/3/1 I am currently running has three warm up sets of five and three working sets, then five sets of ten at 50% plus ancillaries. I am talking all about chest day here because it was yesterday... I used to have elbow pain (tendinitis) and front shoulder pain but since I dropped all the stretching and truly made myself a student of form my pain has gone away. I can even military press now and that wasn't even a thought previously.
Squatting is different. I have to do some hip mobility stuff with bands pre workout, but if I take more than five minutes with it I'm fucked. If I don't do it at all I have some real groin issues going below parallel.
Deadlifting I do glute ham raises and get to it after a few warm up sets.
I have the same lower back issues someone mentioned... always pretty tight and always back pumps. I use a lacrosse ball intraworkout if it becomes cumbersome, otherwise I just deal with that shit.
I bought "how to be a supple leopard" and haven't opened it in 8 months. I find I learn about and try new things when I get hurt... until then, fuck it.