From my experience these last few months, you have to keep your goal in mind. Unfortunately, I wasn't focussed enough on my goal so I am delaying the exam.
You have to remind yourself that you want to do this because you want to get an MBA at School X and the average GMAT score is Y and you want to do at least as good as that.
Another thing you want to do is have a study schedule that is realistic and that you can stick to. I set an average of doing about 20-25 hours per week. More specifically, I'll be doing 1 MGMAT book per week. I need to make sure I can reach this goal per week. Now, it may not be fully possible due to circumstance x, y or z so you need to be ready to adjust. Btw, my current study plan does not include any of the "in action" problems at the end of the chapters but does include taking notes on all chapters (general and advanced) and doing all OG problems (from 12th edition and 2nd edition verbal or math)
wish you the best..so what is your study plan and how do you plan to be more organized...This has been the toughest part for me.