Entering 11th next year any mistakes u made in 11th which u regret?

guys im in entering 11th next year taking commerce i want to know some mistakes u guys made in 11th which makes u regret now and tell me some tips or traps to not fall into :] thank you for your help. ( ik ur busy preparing for yall boards. even i am :[ , plz msg whenever ur free just a junior asking guidance )