I also spend a lot of time studying the project in which I am going to invest. This is a slow process if you really want to invest in a good project. I pay attention to the team, how much information is there about them and how fair is it. Also, an important fact is the communication of managers and representatives of the project with the community on the Telegram channel, for example. Website design, well-written by WhitePaper and much more.
Studying is one thing that you must always imbibe as a culture when it comes to ICO investment, if you do not want to end up getting the wrong side of being a part of a scam. ICOs can be very risky and you really want to know how to manage those risks and be able to make quality decisions.
The best way to practically do this most of the time is to check if there is a minimum viable product, if the team looks like a solid one that is capable of bringing about further development, and the market that this product serves and how the possibility of demand can skyrocket in the long run for it. These are the qualities you want to be looking for.