Doing the same easy thing over and over again doesn’t usually lead to success. Of course, neither does taking on impossible tasks that never get off the ground.
The better way is to constantly take on those things that seem at the edge of, or just beyond, your capabilities or skill level. It’s usually tough to tell exactly where this edge is, but if you’re a little uncomfortable, if every day is a little tough, then you know you’re in the right area.
.