ill tell u d best way
step-1 select a book
step-2 read the theory and all reactions dont use any pen now
step-3 once u r done try to write out what u have read without seeing the text
i bet the third time u write all d reactions u will remember all
step-4 try to do simple ques first then do d difficult ones
i suggest try out O. P. TONDON I HAV HAD REALLY GOOD RESULTS
i was dumber at chemistry before doing it
u can test me any time now