Salesforce: Pre populate form data in create screen

If you understand HTML, you can prepopulate some values into the existing form. This approach is extremely useful if you would like to create a custom button that links to a prepopulated form. This is how you can achieve it:

For example: acc2 represents the Account Name and acc10represents Phone.  You can prepopulate the field by using the following URL:

Note: You may have different URL such https://ap1.salesforce.com. This concept will work also for other objects.