Just go as fast as you are comfortable with now, but remember there will be new horizons and perspectives around each corner and be prepared to be flexible and drop any "fixed" knowledge when something better comes along.
A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James