Then remind yourself of the minor ones too. Don't be modest. Tell the truth about how hard you worked, what sacrifices you've made. If you can't think of any, then begin by congratulating yourself for living as long as you have. Seriously, it pays to take the time to know your strengths and appreciate them.
Confidence is a fundamental trait for flexibility.
It's hard to be flexible when you're fearful, or easily intimidated. Confidence is indispensable if you want to engage someone's attention. The next characteristic that belies flexibility is discontent. In more vernacular terms, this person is called a complainer, a whiner, a wet blanket. One possible reason for this type of inflexible behavior is that the person has set high standards for him or herself and no one, including the person herself, measures up.