How to Fix HTML errors Using Dreamweaver and Aptana

So I found out that our webpages have numerous (the numbers are really pressing!) HTML errors.
What do you have to do to fix it?

Here's what I did:



1. On the first step you can have to version depending on which will work better for you and depending on your website:
a. If your website has an Easy editor or WYSIWYG editor, use it to copy the "preview" - this will give you a cleaner code.

b.