Mostly common sense. My Brother passed his last year and he always said to treat drivers like they are idiots. You do need to revise because the pass rate is really high - like around 85%. I think a month and 2 weeks is more than enough time. My brother was studying for his A-levels whilst learning to drive and he kinda neglected his driving theory revision for A-level revision so when he finally revised for his theory test he had 2 weeks til he had to take his exam and he got 87% on the first try.