How can I stay on track and make sure I cover the topic when writing an essay?
It is all about the organization of your essay around a thesis statement. It should contain your position and two or three points you will use to support it. Think of your points as sections of your essay and divide your word count minus introduction and conclusion among them. For example, a 900 word paper – 150 for the introduction and conclusion – 250 for each of the three supporting points (I use “section” and not “paragraph” here for each point may be developed in one or several paragraphs). Having an estimate of how many words goes to each section will help you stay focused and not write too much on one point leaving another one underdeveloped.
Again, to stay on track, remember to introduce each supporting point and finish considering it with a concluding sentence showing the relevance of what you have written in a section.
If you feel like you hane not managed to create a good structure for your essay, editing can solve this issue, making your essay coherent and to the point.