Thanks guys. I'll be looking to try a bunch of these suggestions and see what works best for me.

As to the pre workout and empty stomach, not this time. I learned my lesson!. I had eaten about an hour or so before the gym. One of my biggest issues is a set schedule. With my job, it's near to impossible. There are days I hit the gym right before work, right after, and middle of the day. Kinda sucks.