You dont have to write every day, but you do have to put effort into your thoughts toward your book every day. 다시 잠자리에서 글을 쓰는 것에 대해 말씀드리자면, 잠자리에서 글을 쓰면 낮 동안 해결하지 못한 꼬인 부분이 해결될 것입니다. Your subconscious mind will fix everything you broke during the day.