Focus on what you do best.
Grade your papers based on your scores. If you've aced it you can focus on them last.
Take your barely passing scores, like your Cs and your C+s, focus on the chapters you really understand.
Once you've gone through that, then only challenge the harder chapters for chosen subjects.
Finally do reviews on your studied material. Dont try cramming everything, You only have a month left. Focus on what you can.
Once done only then try the rest.
If you can cover everything in one month. Good job. but if you dont, dont sweat it. You can try again and hopefully study earlier.
That. or look up all nighters, if you can handle it and it works for you.