- What YC or any VC would love to see is traction.
  - If you have a simplified version of your idea that's 
  functional, and solicit user feedback, take it from there.
  - Work at it during nights at first.
  - If your growth rate is good, apply to YC.

Note: Startups are still too much work for one founder. So see if a good programmer you've worked with in the past would like to team up with you on this.