I've been writing short stories for the past couple of years after I attempted to write a complete novel (200-400 pages) but quit. Now, I've gotten familiarized with a more adult, realistic approach to writing after attending numerous writing classes so I think I'm ready to write a novel and this time finish it. I'm planning on doing a novel with a prologue and three parts. (For ex. Part 1: horizons, part II: the widow, part III: conquer) and ending with the epilogue. I'm asking you published writers and older writers, are there any tips I should keep on mind when doing this? And also, how many pages do you think is necessary in each part? Thank you very much for your help!