You can write an essay by starting out with a plan. Decide what you essay will be about. Then you will need to determine your audience. Do some brainstorming on your topic and write down your key points. You can find more information here: http://ezinearticles.com/?How-To-Write-A...

If you are writing an essay paper first you will have to do a little research. Then write the introduction part, the body and the conclusion part at the end.