I don’t want to sound offensive, but in all honesty, you shouldn’t have to ask. It should be something you want to do and you have to want to get better. There are really good players that practice for 8+ hours a day. But it’s not forced, they’re truly curious as to how to get better and honing their skills.
I also agree with Awww. If you want to be good, you have to practice more than anyone else out there and be so good they can’t ignore you (thanks Steve Martin.)