I always try to choose ICOs with good team and hype here on Bitcointalk,
i also check the manager who posts ANN thread, their reputation means a lot to me
And the last thing is an idea of the project, if its something new
I agree, but I don't really rely on hype since many projects were successful without it. I would choose projects like Menlo One or WePower. Not much hype going on for both, but they are definitely worth looking into..