I'm a huge free-weights fan, Ludacris. My "cardio" sessions usually involve a couple of weights I can change around.
If you're dead-set straight that your form/posture is correct - grab a <long bar that you stick weights on> stake out a little area.
Go Squats, Lunges, Bent over rows, bicep curls and <things where you lift the bar from your shoulders to the ceiling with your elbows not locked out> in a round, rather than set/rep set/rep
You get into a rhythm for the first "round" then go at half speed with a bit more weight for the next, then less weight and more reps the next etc...
Anyway, thats how I do it.. the machines get a bit crowded and I end up cramping all over the place. Not to mention I'm too short for some of the arm ones. I made dad buy me a weight bench for birthday/christmas present.. so I can do it at home now.
But I get off to the gym to do their bodypump classes. The only problem I have is giving myself a day of rest, my poor muscles. I tone it down and go for walks.. but even then I vamp that up with weights (despite several people advising walking weights don't add to intensity and are bad for people with high blood pressure -eg, me-, it suits me fine and accounts for some of my kg loss)
-Em
excuse my non-technical terms, I'm sure you get what I'm talking about