Help me to improve guys

Well basically.. I have an exam which requires 60 wpm (5 character per word) in 3 months..

I do two finger typing for like past 4-5 yrs.. barely managed to achieve 28-30 wpm .. currently i m learning touch typing. Well i barely get 20wpm with 90% accuracy..

How can i improve.. what should i do ? I just want to achieve 60wpm . Please help