What do you think is the worst mistake one can make in sales

I think the worst mistake one can make is "Fear of Failing". I have probably made every mistake listed within this thread but continued. I made the sales pitch on the wrong person one time thinking he was the owner. The correct owner let me know in a heartbeat that he was the owner. I felt like an idiot! It became the best account I ever had and we still chat on a frequent basis although neither of us are in that business. Oh yeah, we still laugh about that day!