According to an interview manga on Weekly Shonen Jump, Oda Eiichiro revealed that he gets up 5am and works until 2am. He would go on a trip with his family if he had a free time but he has absolutely no day off. He feels happy to be a mangaka when he meets famous mangaka he admires such as Toriyama Akira. What he wants the most now is an interesting idea for the story.
Source: Scan of WSJ, Scan2