How do I learn vocabulary and grammar very well?

It can be difficult to get vocab and grammar point cemented in your head but the trick is to cover the word and repeat it to yourself. You must do this regularly and look over your notes every few days as these things can be forgotten very easily. Even if you have post its and every day look at a different post it and try to remember the meaning, the more you familiarise yourself with the content the better you will learn.