What i do is checking the ico at some ico tracking website like icobench, icotrack, coingecko etc. In that way i could check which ico has a better ranking and less risk. But make sure you must invest what are you willing to loose. That's the rule in this industry.
This is not a factor in the success of the ICO. If you focus on ratings then this is a direct way to lose your investment. Trust only yourself. Do not trust organizations that tell you that this project has a high rating - very often this is not true.