Back in 2010/2011 is when I went from 240-245 to 175 pounds. The best supplement stack I ever took (and I have taken my fair share) was USP's Pre-workout JACKED and the fat burner Oxy Elite pro.
Man!!!!! I was so geeked up all of the time on that stuff. It was almost like I was on some drug (which was a reason why it was banned)
Its so hard to match the energy levels I had back then. Could come home after a full 10 hour shift, and workout for another hour on top of that.
I just have to get that ball rolling again. Its hard to stop once it gains enough momentum.
Consistency is key. Back when I used to try to workout after work, I would say, "just walk through the doors and leave. Just get your ass there and then you can turn around and leave". And I would go. And I would stay for a workout. Sometimes good, sometimes bad. They key (for me) was to get there.
These days, I am more motivated and my gym is in the basement and I usually workout in the morning. If I let it go to the afternoon, the chance of blowing it off go up. That said, I am continually dissatisfied with my appearance (it's an illness, really), so I rarely miss a workout.