Splitting A Workout

esteelewis

Question for those of you that lift weights. Its a two-part question.

1) How many sets/reps do you do? Do you follow a certain plan? Previously I was doing 3 sets of 25 at the same weight...but lately I have been doing 3 sets with 12, 10 then 8 reps and upping the weight, which is more of the Body for Life philosophy. My goal is to lose weight so I am not sure which is more helpful. Anyone find more weight loss success with a certain routine?

2) How do you split your workouts? Previously I did one day upper body and next day lower. Lately I have started to split my workouts by group bicep/back; tricep/chest; shoulders/thighs; calves/abs.
However, I keep hearing that a push/pull routine may be good. Thoughts? How do you split your workouts?

Thanks