There are many things to study to choose a good quality ICO. You have to study the white paper, the team behind the project and their experience to implement it and you have to check the ico review sites opinion about the ico. There are a plenty of informative websites and blogs about ICOs. Just browse them you would have sufficient knowledge so as to choose a good ICO to invest. Websites and blogs only help you earn a good project name so that you can self-check.