Some of my better results, as with a lot of people I know, is seperate lower and upper body workouts each week.
An example would be:
monday-upper
wednsday-lower
friday-upper
The following week start with:
monday-lower
wednsday-upper
friday-lower
alternate the beginning of each monday. Keep the exercises to 2 or 3 a muscle group. Keep the workouts short, intense and to the point. Lower & upper bodies are allowed between 3 to 4 days rest before hitting them again. Good Luck.