Cyan that sounds right to me.
This is heavily disputed, and honestly, it varies on a person-by-person basis. Some people are visual learners (so it's effective for them to use videos and pictures to help them study), some prefer being hands-on, etc...
Generally though, I'd say the most effective method that works for most people is through visceralisation. This is the process of associating concepts, words. phrases etc. with your different senses (sound, touch, images...). You can read up more on it by searching up "visceralisation for studying".
Marijuana can be used to feel calm and relaxed basically like zen. this can calm down your mind but can also make you more paranoid and focusing on one main thing. another way is for cancer patients because it can calm them down and help them stay calm.
