My old routine is a little weird. What is it? Well, instead of doing 3 sets of 10 reps on each machine and pausing between each, I used to do cycles of increasing weight. Rotate around from machine to machine so each muscle group gets a rest between sets, but NOT your body in general. Start small with just 6 reps, then crank it down one by one, 5-4-3-2-1, while cranking up the weights to about 20 lbs over what you started. The last should feel like it uses the absolute utmost of your strength.
What does this do? Well, this is a routine for bulking rather than toning, and the truth is, right now I've got not much muscle to work with at all, so 'bulking' is exactly what I need. When I get to where I want, I can switch routines. Isn't this weird and not recommended? Well, all I can say is that when I tried this before, I experienced the most rapid change from total-slacker to buff that I've ever seen in my life, and I never hurt myself once. Well, except for that time I dropped a 35lb weight on my foot, but I don't recommend that!
Two days post-workout and the only muscles that were sore were the ones that I really pushed. I think I need to do this for a while, feel my body wake up and stretch, give it a challenge. Besides, it's a bit different than the usual lift-wait-lift-wait boredom. Check back with me in a month to see if this works!