YES..u must at least do one physics esssay type of questions from any physics topic everyday.May be u can do some proper planning, start with form4 topics first. Go find an exercise books if u dont have one right now
The same method also can be applied if u r weak in paper 3 , then do at least 1 question from paper 3 everyday. If u consistently doing this, i'm sure u are ready to move towards another bigger step..which is to go all out in the real battle & shoot for an 'A'.
As people said, thousands steps start from a humble single step..