I realized that it was time to switch my workouts since I have been doing the same types for a while. New lifts, new machines, switch things up, etc. I thought about my workouts and figured I might have been slacking a bit. Reflecting, I would just try to pump out some reps at a high rate before dropping the weights and feeling satisfied.
Well after going through my new workouts with a bit lighter weight to get an idea of the weight I should start at, I really focused on doing the correct forms and let me tell you, I must have not been focused on that before, because my body is feeling good and sore.
For example, my old chest exercises made my forearms and shoulders a bit painful towards the end. I dropped the weight a bit and read up on proper form, and focused on that while doing a bit lighter weight more slowly and I really started to feel it in my chest. The analogy was "imagine a can sitting between your pecs, and when you press the bar up, try to crush that can with your pecs...your arms should have minimum focus, otherwise you will feel pain or not work the chest correctly."
Just one example, but the moral of the story is to really focus on form and getting things right to maximize your workouts, as opposed to not doing everything correctly and throwing around weights mindlessly.
Thought I'd share my two cents and offer up the advice of really focusing on how you're doing things, and doing it properly to really train everything you want. It feels great!