You need to pull up a recent paper related to your specific project (preferably from your lab if your data was based off someone elses previous work) and read the papers cited in that article. Know the previous research really well.
I find this order of typing the most efficient:
1. type up the results section. Doing this first will give you a great understanding of the project. Type up the titles for any images.
2. Type up the conclusions. Again, you'll need to have a firm grasp of the results and past literature to make your best conclusion.
3. finally, type up abstract and methods.
Lastly, you should be prepared for the dreaded revision phase. Often during this time reviewers will come back with other needed experiments to be done, yada yada. This can take months to years to complete, it's all up to luck and the reviewers.
Good luck!
Edit: damn you said editing, not writing....
forget what I said. read some previous papers cited in yours and get an idea what they're talking about. read for clarity and how "scientific" it sounds.