Every student makes mistakes. It is how you learn. But you can fight your mistakes when it comes to geometry homework and learn how to improve.
You can only make the most of your time at university of you are inspired to engage in both social and academic activities, to get involved and to develop personally. This cannot be forced upon you, and in order to achieve this motivation, you must first discover your own interests, needs, capabilities and goals. If you are still uncertain about these things, self-evaluations and tests can help you to establish this information. It is also imperative that you are aware of the opportunities available in your line of pursuit (or in any other field). Most universities provide career development advice and services that are knowledgeable about the opportunities in each major and people that work in each field of interest. You should also be aware if the requirements of the major that you choose to pursue before you embark on setting personal goals and modelling a schedule around them.
Regardless of the reasons for your demoralization, you should be able to rise against them and correct the problem. Allowing friends and relatives, anxiety or substance abuse to dictate the direction of your life is a sure-fire path of self-defeat. Identifying these issues and working to redeem yourself from them will enable you to regain your motivation and return to the pursuit of your goals.