Not a easy question to answer as ICOs which appear to be great have turned out to be scams  some which come to top of mind are Ethconnect ,BCC cash, Davor coin ,Bit serial . Some of them have vanished some are their but who promised that the coin would be on moon are on ground still . so follow the following
Do  research on social media channels , look for the project , White paper , website and earning model ,  follow Twitter,  Telegram Channels, see the comments and then decide on investing

even you invest invest only what you can afford to loose no borrowing