I am new to the SharePoint technology. I need to create a workflow when a new document has been uploaded to the document library, it should fire an email to a particular user. How to do this?
Here is link to get you started with developing workflows with Sharepoint designer:
You can easily create workflows in Designer and use workflow action 'Send an e-mail message' to reach your goal.
If you have any additional questions feel free to ask.
You don't have to use workflows for this basic actions, if you don't want to change body of outgoing e-mails, try to use alerts, here is the page with step-by-step guide.
You can setup alerts for new items only, for changes or for deleted items only.
I know its too late a reply for this question but for the refernce of people who might open this question anywhere in future I would like to add a link which really helped me a lot in starting with workflows. It is an excellent resource for workflow related videos provided by Robert Shelton. Really very helpful if you are a beginner to workflows.