I'm an about-to-be A2 French student. French is a great subject and methods of revising for each aspect will need some polishing to accommodate the needs of A Level as opposed to GCSE!
For the speaking aspect, I try and describe a lot of my surroundings in french, my thoughts in french, speak to my french friends etc. This really helped me gain confidence and I changed from being the girl who never spoke in class to the one the teacher couldn't shut up
To memorise vocabulary, the app Quizlet is great
you can make your own interactive flash cards which I like using on my ipad and iphone, especially before the vocab tests we'd have. Try and learn around 10 new words every week, or if you have time and want a challenge, every day learn 3 pieces - I know this doesn't sound a lot but throughout your a levels you'll have loads on and there isn't really time to be memorising lists!
Listening is probably the hardest aspect of french for me... I try and combat the stress it gives me by listening to the radio, watching movies, listening to french music, french news - anything french! I particularly enjoy listening to french youtubers - many are funny and it means that I can get a good challenge
I wouldn't recommend the youtubers until your A2 year - you don't want to be picking up street slang ! As for watching movies, I would recommend watching with English subtitles (obviously), and when you feel comfortable progress to watching them with french subtitles. I like watching some of my favourite tv programmes dubbed in french with no subtitles (sometimes) as this really forces me to listen hard and pick up words! Great french films I recommend you watching if you haven't already: Les Intouchables, Amélie, Ne le dis à personne, Le diner de cons... There are so many out there! Just have a nice google
Reading is quite obvious - read in french as much as you can. There are some books every french student should read for example Le Petit Prince, Bonjour Tristesse, Bel Ami, L'étranger... There are loads and loads! Utilise any library and look for some good reads. To get some topic specific vocabulary, read articles on stuff you're interested in be it sports or fashion or whatever. This means the vocab kind of flows naturally
Grammar is probably the most important thing when trying to revise and improve your french. I would recommend investing in a good grammar book (but this isn't mandatory)! For me, I want to take french past a level studies so I've got a copy of Glanville and Price's complete french grammar guide.
You'll know what methods of revision work for you but for french I like using flash cards to get grammar vocab rules etc down for memory! Posters are quite good too actually! Making Mindmaps just didn't work for me!
Word reference and conjugation.fr are great for essays. The first is basically the best website for trying to find translations of words, their uses and so much more - you can't be using google translate anymore! It just won't work! The latter is for help with conjugation and is excellent. It really helps when I've completely blanked out on how to conjugate the past subjunctive of some tricky verbs!
I've said enough ! Hope this helps - you can PM me for any more questions or help if you wish!
Bonne Chance