No. 6: Don’t doubt yourself. As long as you lack… No. 6: Don’t doubt yourself. As long as you lack self-confidence, you will always feel like you’re at the mercy of other people. 7 Powerful Mindsets of Confident People success.com Confidence is the cornerstone of leadership. SUCCESS Magazine Posted on Facebook Blogged by Blo.gl Indexed in Google Brought to you by Now Lifestyle where you can start a six-figure home business (six-pack abs included) for under $50.