Every salesperson has that one sale that took a year to close, went through 37 levels of bureaucracy, or required them to win over a whole team that wanted a different product. Tell that story -- and get specific. Talk about how much time you devoted to the sale and how you justified that time.

You want to demonstrate how you thought strategically about your time and your company's resources -- not how much time you wasted closing a small deal. So, make sure that deal had a big payout.