I agree with the above info.
It might be a good idea to vary your workouts anyway, just to keep boredom from setting in.
I do Curves4Women 4x a week (this combines cardio and strength training), and I try to walk or swim 4x a week (cardio). I'm going to start doing some breathing exercises too. Sunday is usually a good rest day for me (even if I go to the pool, I try to play and not exercise).
I do believe that God designed our bodies to take a rest one day a week.
As for a treat, I've got a yummy recipe called Snickers Pie that I'll post later in the Recipe forum, now this is a treat! Lowfat, lowsugar, but really yummy -- it's an ice cream type of pie.
And, for loosing weight fast, I totally understand your desire to do it quick, but I have learned from years of experience, faster is not always better. Focus on loosing 1-2#'s a week, focus on eating right -- HEALTHY -- and focus on exercising as often as you can. Don't rush it. You know that you didn't gain all the weight in a month, don't expect to loose it in a month. Also, if you are a faith-believing person - then pray about your needs and desires to God.
GL to you!