Hi! I can only really help on the maths front but firstly I’d say revise all of your subjects at the same time as that will stop you from getting (as) bored and make sure you do something either in the morning or evening like going to the gym, going down to the shops etc. (Just to keep your mind fresh and get out of the house!) For maths I would make a formulae sheet of all the formulae and graphs and anything that stands out to you for C1 first. I would test yourself on it until you know this sheet inside out and then do questions. I would then do the same for C2, however, don’t forget to keep going with the C1 as otherwise it’s very easy to forget and then you just end up going around in circles! I have also made flash cards which I read every night to refresh topics to myself in all my subjects. Lastly I would definitely recommend getting the app alarmy which asks you mental maths questions when you get up in the morning! It may seem like torture to start with but even within a week you would be surprised with the difference it makes (that’s if you find it as hard as I do to get out of bed!)! Hope that helps!