Early on, it's good to develop the ability to write. Learning to write is a useful exercise, even if what you're writing about is not that relevant.
Before I go on stage, I knock three times. Three is my lucky number; I once went into an audition and was number 333 and got the best part ever.
Scarce any problem will appear more hard and difficult, than that of determining the distance of the Sun from the Earth very near the truth: but even this... will without much labour be effected.