Study, study, study! I can’t really tell you what not to study, but focus most on subjects you aren’t the best at. Say your best subject is history. You don’t want to study hard on history when you already know all that. Study your weak points. Good luck, and I hope this answers your question!
Keeping up with the Joneses is an idiom in many parts of the English-speaking world referring to the comparison to one's neighbor as a benchmark for social class or the accumulation of material goods.