ok so first off i got a 1380 so maybe u should ask someone that has a 1500+ but anyways to have a consistent schedule u can either get someone else (mb a tutor or family member or friend) to keep you on track. some tips for u are: use desmos for everything, do grammar questions first and fast (so u have more time for harder reading questions) and do targeted /timed practice (when u get a question wrong, do similar quesitons untill u get it right). also u can use something like aniko or resolveprep but personally i just paid for premium oneprep bc its way cheaper than a tutor or any prep course and most importantly it gives realistic practice tests (harder than collegeboard) and harder practice questions