The Ellevest target client is the professional woman who either has her own money or has agency over her family's money. She is among the 75 million women in the U.S. workforce who want to take financial control and is looking for a straightforward way to achieve her dreams on her own terms.

Your career is not going to go the way you planned. It is impossible at the age of 23 to pick the right industry, the right company, and you can visualize what you're going to be doing in your 40s, 50s, and 60s, but chances are that it's going to be something quite different. So remain open to opportunities and change.

As an entrepreneur, I've learned how crucial it is to be able to call a spade a spade and avoid falling in love with a particular strategy or product. Instead, you need to let the customer tell you what she needs - and to change her as she changes.

On Wall Street, the industry in which I grew up, a culture in which 'my word is my bond' shifted over the past few decades toward one where the big print can say 'Free' while the small print gives the real costs.

Ask any woman who has gone through a divorce and had her standard of living decline substantially. Ask any woman who's been fired or 'reorg'ed out' and had to scramble to take a job she didn't want. Ask any woman who wanted to quit a job but couldn't afford to. Investing is possibly the best career advice women aren't getting.