My schedual goes like this: Monday: chest/shoulders Wensday: Legs Friday: back, bicep/tricep, cruches 10-15 mins of cardio before each workout, then 30-60mins cardio randomly throughout the week when I have time. The point is, I walk into the gym, and just go to whatever is open. I do 3-5 sets on each machine, I change the reps and weight randomly too. I usally start with 15 reps and go down two at a time on light days, then 10-12 reps and go down 2-3 per set on heavy days. I'm seeing results simply because I'm working out and eating right, but is there something I'm missing by not doing the same thing every week? I get, IMO, a complete workout for each body section, but it is totally random. Some chest days I'll skip barbel workouts all together and just do dumbell press/flies and maybe a few sets of pushups and shoulder raises. Somedays I'll do flat + incline bench, and other various chest/shoulder exercises.