How to be attractive and gain self confidence?

In my experience since I was a kid, I'm always looking for how to be attractive and gain self-confidence?

1. Be yourself: People can sense when
   you are being fake. Life isn’t high-school. Learn to be comfortable in your own skin.
2. Be encouraging: Genuinely help and encourage people to do better. You will feel good doing it. And people will like you more.
3. Become interesting: Boring personality just means you are bored. Bring intrigue in your life. Do something new, every day.
4. Don’t gossip: Quality people don’t gossip. They don’t need to put other people down to feel good about themselves.
5. Good listener: Don’t think of what to say; rather listen. You will intuitively know what to say if you listen carefully.
6. Ask questions: Question that begins with “why” works best. Let people discover themselves when talking to you.
7. Stand-up: Have the guts to stand up for yourself when someone isn't treating you right. It’s a hard skill to earn but worth it.
8. Check insecurities: It’s uncomfortable to be around people who beat themselves up. Learn to get over your insecurities. Change them or accept them.
9. Don’t complain: Don’t bawl about how this sucks and that isn’t fair. This won’t get you anywhere in life. And quality people won’t like to be around you.
10. Be humble: Nobody likes an all-time show-off. Yes, you are good enough but you don’t need to shove it in people’s faces.