Gcse advice please?

Basically I've crunched my numbers and in reality I only need 4/5's in history, re, and maths to get the point score I want, as I've already got my 5 in IT and I've got consistent 8's winging business study exams, aswell as 6's in english lit and language
Baring in mind I've completely binned off science, what's the best way to remember specific details for history and re, as the exam technique is fairly similar.

Cheers for any advice, good luck for exams next month.

- W