[silicon toad2000]

I might be spouting stuff you are already doing.
I'd suggest that you may want to put as much effort into your nutrition as you do into your workouts and put some thought into recovery also.
As a minimum a good vitamin supplement to complement your diet.
work out the carb, fat and protein content of each meal and ensure as the day progresses that the carb percentage of meals decreases and the protein content increases.
for example breakfast should be a high carb, low GI meal, just before you workout a high carb, high GI snack and a high protein meal after your workout.
As far as other supplements go, I use L-Glutamine pre workout as it help sustain the amino acids and hydration of the muscles throughout the workout and helps them recover after the workout. I have a low calorie protein powder in water before bed. if I workout in the morning I'll have this drink after the workout in milk/soy.
with the workout, warm up, do the weights, then stretch those muscles after weights not before (But do make sure your are warmed up before the weights), then cardio only after weights, ensure you cool down and stretch after the cardio. Do try to avoid working on the same muscle group two days in a row.
Again, sorry if this is stuff you are already doing, just sharing some knowledge.