For me, I literally just organise a schedule. 1 subject to revise everyday and 1 other subject that I will just briefly flick through the textbook with. I sit down, make notes and make things concise, but easy to understand and draw diagrams if I need to. People say making pages of notes isn't the best way, but for me it is. Also, I find that if I do 1 unit of a subject every week and then lecture to myself / someone it helps you to memorise too. In addition, I think once you feel confident about knowing a topic, TEACH or EXPLAIN to someone, that puts your confidence and knowledge to the test. This helped me tremendously in history. I have a friend who knows literally everything about history and politics and I lectured to him and he added in anything I missed. The exam was a breeze.
Also, for me, switching off my phone, TV, laptop doesn't really help me. It's kind of weird, but when I have those luxuries right next to me, I feel like I'm in an everyday environment so I'm more comfortable and is able to revise better.
In terms of finding motivation, I made a post a while back and someone said "just stop thinking about it so much and JUST DO IT". This has helped me, it's simple but was effective for me.
Also, I recently had mocks for my GCSEs and I left only 2 weeks to cram everything in and this has taught me a MASSIVE lesson to not leave revision for the last minute.