I do 30 minutes on my exercise bike each day, getting my heart rate up to between 150 and 160 beats per minute. In addition, I do the following weight lifting schedule:

Monday - Calves and shoulders

Tuesday - Legs and abs

Wednesday - Calves, back, and biceps

Thursday - Legs and abs

Friday - Calves, chest, and triceps

Saturday - Legs and abs

Sunday - Day off (cardio only)

Each weight lifting session lasts 30 - 45 minutes. I workout for six weeks, take a week off, and then start over with new exercises. It is important to mix things up, so I try new exercises all the time. I suggest buying magazines like Muscle & Fitness Hers and Oxygen to get lots of ideas about exercises to do.