Whens your GMAT test? If its just around the corner the best way for you to actually do well there is to consider taking GMAT lessons. These can help you to polish your skills and help you to achieve the goals that you are after. In many cases, this is the most ideal way to do well.
Dedicate time to GMAT lessons. Graduate school can only be beneficial to you when you actually dedicate time to it. This means taking the time to actually study and learn. Give yourself a schedule to follow that allows you to study over a period of time.