By Mark Graham, EO Toronto member and president of Right Sleeve Marketing, Inc.

When I graduated from college in 1997, I started my business career in investment banking. I lasted four months. While the experience was rewarding (I learned how to use Microsoft Excel like a pro!), I found I was more suited for entrepreneurship. I always wanted to build something I could call my own, and it turns out I have a mind for sales and marketing, not finance.