You will feel a plateau in your work every now and then.
So what to do?
Find another new incline to climb
Look at the sheep and cows along the way
Stare at the endless horizon whilst at the top of the hill
Sit on a rock and plan your route up a higher peak
Find a friend on the hill and push each other up
If all the above fail, decide when is a good time to descend from the hill. You have seen enough and it's time to find another hill to climb.