Pay close attention to the company you keep. Are you seated at the grumblers' table, where naysayers gather to share stories of failure? That's a dangerous seat for a sales professional to sit in. Why? Negativity has a way of multiplying until failure and rejection start to seem normal. If you start believing it, then it could very well become reality. Choose to spend your time with people who help keep you on track toward your positive goals. When things go wrong, talk with these people – but don't just complain. Keep the focus on how you can turn things around.