Develop a non-game Functional Technical Base
Not all the exercises below have a game functional place in the game, but all will provide a great technical base on which all gane functional techniques can be built upon.
In regards to practice :
5 minutes of focused and purposeful practice a day, in the right direction is infinitely better than time spent practicing (for any length of time) in the wrong direction. Short and frequent is much better than an infrequent big session.
And if your goal is to be the best you can be, then in regards to the quote : No matter how hard you work, someone is working harder.
You need to be that someone.