The last point I want to make has to do with the specifics of strength training.  It should take 20-30 minutes for general strength training.  If you become serious in weight training those times can increase drastically.  A lot of people have concerns about becoming bulky, however, unless that is your goal, you will not bulk up with endurance strength training. 

So far everything I have written in this series, is all you need in order to lose weight.  However, that does not mean you will be healthy when you reach your goal weight.  The last piece of the puzzle is exercise.