Is it best to focus on upper body one day, then core/abs the next, the lower body the next, and so forth? I don't really need to take rest days. My muscles don't even ache the day after a workout, though I do feel the burn intensely during workouts. I guess I recover quickly. I'm a freak of nature, I know.

I already don't have much body fat. My butt and thighs need work, and a little bit on my obliques, but that's it. I heard that doing cardio is bad for someone with my body type because I will burn the muscle instead of fat. I have a high metabolism, and I eat 5-6 small meals a day. Eating healthy comes easy for me since I had to eat super healthy during both my pregnancies. I got used to not eating sugars. I still do enjoy fruit but usually only in the morning hours, or I have a banana after a workout.
Right now the only grains I eat is quinoa and brown rice. I occasionally eat Ezekiel bread. I take a vegan organic protein shake every day, sometimes twice a day, which I know has helped me build muscle mass.
I don't have access to a gym. I live in a rural area and being a mom, I don't want to drive half an hour, then workout for an hour and a half, then drive home for half an hour. That's just too much time away from my family. I currently workout at home, while my younger son is napping.. I have a pull up bar, and I can do chin ups very well, and just started being able to do pull ups. I love doing body weight exercises. I'm buying some weights this weekend. 8 and 10 lbs. I also own a rebounder, but don't use it much anymore, because I don't know if I should be doing cardio or not.
Is it better do focus on specific sections of the body, each day? Or is doing overall body workouts better? Any tips on toning up my butt without gym equipment? I would like one of those sexy bubble butts I keep seeing CrossFit girl having. I assume they get that from doing dead lifts.

Any thoughts or advice are much appreciated!
