Sean Stephenson is a nationally recognized motivational speaker, author and psychotherapist with powerful messages to share about how people can stop sabotaging their own efforts towards achieving what they really want in life. He calls these blocks your "buts." He describes the "but triple threat:"

But Fears - "but what if I fail"
But Excuses - "but I'm too busy, too tired, not a morning person, etc."
But Insecurities- "but what if I'm not ______ enough ?" (fill in the blank)