I love this speech of Neil Gaiman’s, so much so that I show it to my creative writing classes every time without fail. It’s just under 20 minutes, but it’s terribly worthwhile – not just if you’re a writing, too – it’s applicable to every creative person.*
* I.e. everyone, because I believe that everyone can be creative – just look at toddlers and preschoolers if you think the impulse to create is something reserved for only a special few!