how shall I revise tips from a grade student
It matters on what works for you, because everyone learns and obtains information differently.
My friends like to make colourful mindmaps to help them revise - but for me that doesn't work. I tend to make notes from the revision guides / online youtube videos, and then write them up on flash cards. Flash cards literally are the thing that work the most for me they're so good. It's all about finding what works for you, and remembering to take breaks so your brain can understand the information rather than cramming it all in, drinking water and eating healthily also contribute, as does getting enough sleep and spending enough time doing social things rather than just revising all the time. There's alot of factors that contribute to a healthy mind so you can revise properly. Just find out what works for you.