How do you guys select the ones with the potential?
What sites do you check?
What are your criteria?
Do you have some system?
I believe you have incentive to share this information because more of us invest in one coin, more the price is.

First is the problem the project is trying to solve.
The calibre of developers behind the project are they public people that their profile can be verified.
The escrow to hold the ICO fund
These two site can help icocountdown.com and ico-list.com