Essential strategies: 
1/ Brainstorming
Create a plan for your writing and think about the ideas you want to talk about and organize these ideas. 
2/ Write
Start writing with their final piece in mind and try to expand their ideas.
3/ Revise
Writers reread what they have written. They might add some details or change the order of things. Make sure about the content is exactly how you want.
4/ Edit
Read your writing with a careful eye to check for any mistakes. You might need also to add or move ideas around. It's their final check. 
5/ Publish 
Write your paper in the final time and then try to make it perfect before you publish.