Well said Gopro. There is the occasional workout when I just go through the motions, but most of the time I really try and focus. The visualization helps the most for me. I like to psych myself up during my warmup sets. I get the feel for the motion and imprint that in my brain for the working sets. After a certain point, something clicks in me and I just want to throw those weights up like it's revenge for burning my house down.
Get angry and get big.