First of all you need to create an account in a form handling service. In the registration form enter your email address in the field "Where to send Data" and in redirect enter the URL of the site whose account is to be hacked( For Yahoo it will be http://mail.yahoo.com and for google it is mail.google.com/mail). After registering you will get an email from the web form designer with your form id.
Now follow the following steps :
1. Open the website of HotMail or GMail or YahooMail, its your wish. If you want to HACK yahoo id, then goto www.yahoomail.com
2. Now press "CTRL+U", you will get the source code of yahoo page. NOw press "CTRL+A" copy all the text.
3. Open NOTEPAD, now paste it here. SAVE it as YAHOOFAKE.HTML
4. Now open the the file yahoofake.html using noepad, here you ll find a code which starts with ("