WATCH THE VIDEOS - THEY EXPLAIN WHAT I'M SAYING IN A MUCH MORE UNDERSTANDABLE WAY!
Everyone puts too much focus on revision. Minimal revision should achieve all 8s and 9s and leave plenty of time for other activities - activities that are just as important as grades (enrichment).
In my opinion, there are 3 stages we need to consider when learning a topic:
1. Before
2. During
3. After (Revision)
1. Before
Before learning a topic, you should aim to get a brief understanding of how everything links together. Perhaps create a mind map for this, or a list of related key words. I like to ask my teachers for a spreadsheet of what we're planning to learn through the year and pre study accordingly.
This video explains the concept quite well:
https://www.youtube.com/watch?v=Wg4K2Np1ybk2. During
When in lesson, you should already have a brief idea of the content. Consequently, you can take non-linear notes more effectively and efficiently. However, non-linear notes require you to write down the information in an easy-to-understand way personal to you. This makes pre-studying even more important - as you won't be following the teacher step-by-step. An example of non-linear notes would be a mind map. REMEMBER: effective mind maps have colour, lots of doodles and are comprised of mostly key words.
This video explains the concept quite well:
https://www.youtube.com/watch?v=V6MXP0NK9hA3. After (Revision)
Don't rely on one technique (anki flashcards...). Instead, when revisiting a topic, watch a video, look over a mind map and recall the information, draw a mind map on a whiteboard, use the feynman technique, put any illogical facts onto anki flashcards. In my opinion however, past papers and topic questions should make up the majority of your revision.
BONUS TIP:
The specification is gold for any test - it tells you everything you need to know and nothing else. It's always useful to look over the specification before and after learning a topic.
SECOND BONUS TIP:
Every subject requires different techniques for revision (history, timelines; maths, lots of questions; english, character profiles) - make sure you use the most effective.
That was quite a basic post about studying - by basic I mean easy-to-understand terminology - but it should help a little.
Good luck!