This should be done only by yourself, i mean at the end decision is always yours.
Selecting ICO could be hard even for a experienced investor, as scam nowadays is packed in a "shiny package" and lot of people fall for it sadly.
There are some key facts that you should look in ICO:

• Team and their experience (members should have public profiles on linkedin)
• Publicity of the Team (how freely they communicate, answer questions about project etc.
• Advisors if any (always a good idea to contact this person yourself to be sure that he is really advising particular project
• Check when the project website is created, and registered (also a quick method to suspect a scam project)
• Idea of the project (try to evaluate value of project by yourself, what perspectives it has, or is it just hype)

The list could go on and on, but this are the main criteria which i use to look for ICO with potential.