Greetings of the Day!!
In order to get command over management subjects you need to generate an interest in them. Basically in management you have mostly theory subjects like fundamentals of management, communication etc. If you are going to learn theoretical subjects then you can learn easily by applying them practically. You don’t have to do them practically, just sit and do a thought experiment.
You also can understand that subjects through connecting the concepts with concrete examples, things which you are doing or using on regular basis. Another way to have a command on management subjects to make proper notes when you read the content, when you reread your own handwriting, it’s always easier to remember. Or you can bullet out important topics, make the summary of them. It will help to remember important things without needing to learn unnecessary things. You can also remember the keywords especially in the case of theories then you can frame your own sentences by using those keywords.
Reading is the key element to understand the theoretical and management subjects. It means extensive reading not like think of some other thing in background. Simply try to understand what author is trying to say. Whatever the topic is, just try to understand it in your own words and in simple language.
When you are going to learn management subjects then it is important to explain that topic with others through presentations. Speaking out about topics will give you fair understanding on your grasp of subject and help out you to be more presentable.