I think that the best way to find funds for new projects is private sale, because in this way you can find a large investor who can invest large sums of money, and all other areas are more small fees, but if the project is good, it will collect all the ways equally well .
ICO marketing and public relations have a direct impact on attracting investors and successful collection of the necessary funds. The quality of the advertising campaign will directly affect the interest of investors and their support. Also posting project information to blockchain forums.