Take breaks to refresh your brain
Drink plenty of water but not so much that you have to go to the bathroom a bunch
Chocolate helps with memory, I recommend chocolate chips
Don't listen to music with words, soundtracks are fine though
DON'T COPY, you will end up feeling guilty, get your own answers, you'll end up learning more that way anyways
Once finished, reread over it for grammar checks, if you really want to you can use an online tools for plagiarism checks, there is nothing wrong with that
Take notes while learning
Set aside as much time as you need to make sure you get this done
Be confident in yourself;believe that you can do it.