advices pls

i have been giving 4 mocks every week but my score is contant when i go home and solve there are many questions that i make but during paper its either that i dont get enough time to do them or think its lengthy and will jump back to it but that doesnt happen im not ablento maximise my accuracy with marks currently my average is 120 marks how do i lift it i think im not attempting paper in a strategic way and planned way me sirf jaake jitna padha hai utna deke aati hu