I find drawing every day to be very important, if you are trying to be a real professional artist. Now not all of the old masters did it everyday, but they spents hours on their paintings when they did, some spending a exstream amount of time on one large painting, taking a break, then going to the next. Everyone is differant but the same thing everyone has is spending a lot of time on their art and treating it like a real job. Unless art is just your passion and not a job, then it can be treated differantly.