r/u_CapitalReply2019

hey y’all! i urgently need some advice before my IELTS test in a few months.
how should i learn and remember vocabulary so it’s actually useful and effective, and doesn’t take too much time to memorise?
additionally: i am currently around b1-b1+ level and i would like to get 6.5-7 score (i have about 4 months to prepare)