Do research like a real investor. Otherwise you are just a gambler.
The one answer that will be repeated multiple times is also the most logical one: Lots and lots of research.
This is sage advice, but is it wrong if this forum member seeks the forum community comment as part of that research process?
If we're going to respond, let's offer some real help. If you can only respond with "do research" you don't have anything to add to the thread.
He asked a simple question, "how do I choose?". The simplicity of the question led me to believe that he was looking for a simple answer, so I gave him a simple answer.
I could have responded that investing in an ICO is a complex and time consuming process that requires evaluation of the goals, the potential returns, the risks, the plans, the technology, the market, the competition, and the people. I could also have gone into some detail about how I might evaluate all of those aspects, but it seemed to me that the OP just wanted a simple answer instead.