I love Scrivener. I use it for National Novel Writing Month, writing tabletop adventures, essays, homework…anywhere that I want to have all my writing intelligently split up and also have all my research available for me without switching programs (and therefore contexts). Getting a long trial PLUS a 50% discount if you win NaNoWriMo this year is a sweet deal. If you are a writer at all (and have a Mac) than you should jump on this.