You have to do some researches. First of all you have to learn some general thins about coins and icos. What are good points and that are nogos. Then you have to know what project is behind the coin. And if your new in this sector, you have to do some researches about that. So you have to do a lot of work.
People persists tell us about find the team project bla bla bla ,... but do you know the real facts about most of coins is the team development which showing up is anonymous or fake id , none of them reall have a true identification. So how can you just spot a good coin by checking a name that doesn't exist or being fake?