to be able to find the ICO are legit, it is indeed not easy. Because nowadays with so many existing ICO, it will be increasingly difficult. I even feel it. Because some times also found the project a scam.
But to look for legitimate ICOs sometimes look legit but after almost a month of running ICO people they will only know it is not valid at all, or sometimes they stop their ICO because people question them.
But do not give up to always try.