Only work with projects you love. That will make your creativity blend with your vitality, and the project will create itself.
One of many challenges is of course to create a legal basis for copyright issues that's up to date with both modern distribution, consumer behavior and the rights and needs of creators and copyright holders.
My films require that the spectator ask the big existential questions. If you're not interested of turning inwards for answers, my films won't fulfill their whole purpose.