I've seen those ads for mystery shoppers, too. I always wonder how legit they are.
I work from home doing web design and I have an online boutique. I started my business about 3 years ago when I was put on STRICT bed rest for almost 3 months while pregnant with my daughter. I used up all my maternity leave before she was even born since I was stuck in bed, so I FORCED myself to make a successful home business. The other option would have been going back to work and putting my newborn in daycare, which I absolutely refused to do.