You should read the text again after I have lectured on the material, just to make sure you understand the material. Also, I have actually pulled questions out of the text and asked them on exams. Oh joy, more writing, but this is a way of organizing your material. Write reactions, mechanisms, nomenclature, laws, equations, rules, etc. For example, put a term on one side and its definition on the other.
Every few days look at the term and try to remember the definition.
For a change of pace, look at the definition, and see if you know the term. Do not wait until the last minute to study for an exam . I know you have a lot to do, but trust me on this one. Yes, you can try to memorize the material at the last minute, but you only keep that knowledge for a short period of time. I expect my students in organic chemistry to understand what they took in general chemistry.