Hi All,
I have few points to stay confident in every aspect:
1. Structure your day.
2. Keep up with your industry.
3. Know your strengths.
4. Listen to motivational CDs while you're driving.
5. Hang out with optimistic, positive people.
6. Do some volunteer work.
7. Limit your listening to "The News" on radio and television.
8. Start a self-improvement project.
9. Nurture moi.
10.Pursue your spiritual path.
You can refer this article also which I found useful:
How to stay confident in your decision to start your business : Startup Spark
Best wishes