How to create Web-To-Lead ?

1. To create a Web-to-Lead form, click Click Your Name | Setup | Customize | Leads | Web-to-Lead.

2. Select fields to include on your Web-to-Lead form.

3. Specify the complete URL to which users should be directed after they submit their information—for example, your company's home page for a thank you page—and click Generate.

4. Copy the generated HTML code and provide it to your company's webmaster to incorporate into your website.
    (or)  save the copied html code into your local drive eg. c:\salesforce\WebToLeadExample.html

5. Click Finished.

6. Double click the WebToLeadExample.html file saved in step 4 and enter the details and click "Submit"

7. Click the Leads tab in your Salesforce application and check the newly created web to lead details.