Here are some good tips to follow in order to make a good non-fiction essay.

1- Read and read a lot: is not only reading you have to read good writers. you can get guidance on the internet.

2- Be critical: been critical will help you aim for excellence.

3- Grow you vocabulary: try learning a word a day. This will give you a great advantage.

4- Make this a habit: if you make writing a habit you will become the best on it.

5- Authority: read about the topics you will be writing so you will have arguments when creating an essay.

6- Outline and thesis: These two are the pilars for your essay. Making a good outline will direct you to a good essay.