Amy Gottesman left a very successful career in fashion to take care of her very young children. But then she started missing the income and found herself with time to spare when the children were sleeping. Thus started her journey as an entrepreneur, initially she tried out traditional marketing like mailing out coupons and advertising in local newspapers but that did not work out and she decided to try out Google Adwords. Six years on her annual business revenues run into 6 figures, she has worked with Beyonce and the White House, and still gets 2/3rds of her business through pay-per-click campaigns.
Source: NY Times