Editing NewForm.aspx (List Entery form) in Designer

I found a very interesting article today for editing NewForm.aspx, a page to enter List data for a List in sharepoint designer.
So if you want to hide some columns when uers will enter the List data , or if you want to show the list columns in a grouped manner, then the below post will definately help.

http://sharepoint07.wordpress.com/2008/02/05/customize-the-newformaspx/