To start, I would suggest mapping out everything that you need to get accomplished before starting any actual work. This way, you can prioritize which parts will take up the most time and/or effort. If you do plan on replicating a sort of study in order to gain primary data, I would say get that replication out of the way. This way, you'll be able to focus on finding results, analyzing them as well as discussing what they mean. You'll also be able to give yourself more time to do this so that if need be, you'll be able to look at your writing multiple times, each time with a new set of fresh eyes. Finally, I would simply recommend that you have as many people look over your work as possible so that you can catch and correct as many mistakes as possible. When you have people review your work, you'll get different input that can inspire you and make your essay just better overall.
I hope that this helped one way or another.