This article by Neil Gresham has a slightly misleading title. Most climbers emphasize training as, well, actual training time on the wall. The reality is there is a lot of improvement that can happen OFF the wall.
It's important for recognize your weaknesses when you are climbing. Every time you fall is a new lesson for you to learn and a new opportunity to check I with where you are versus where you want to be. Don't get caught up on the rush to push grades as you will just ingrain bad habits that you will just later have to unlearn.
Use the above lessons to set small goals for yourself to help focus. Make sure you are working on good technique. Don't pay attention to the grade level as grades are more of a suggestion than an actual level. Sure they sound good but what do they really mean? Finally make sure you are working on the mental aspects of climbing. It's amazing how mental climbing is.