Gmail secret

You can create multiple user accounts (IDs) on 90% websites with a single gmail id .

Atleast Every website dont allow you to create more then one account associate with same email id and you know it better..

But if you have gmail account then you can create many accounts on a websites.
Its possible because gmail account don't count dot(.) in email addresses.
thats means
anyname@gmail. com
and
any.name@gmail. com
both are same email address . Yeah if you send email to anyna.me@gmail .com then it wil go to anyname@gmail .com

that means if you already have ur account on a website with yourname@gmail .com
you can create you.rname@gmail .com

but facebook is listed in the 10% websites. it dont allow this even u use dot.
But 90% websites includin twitter will allow you to signup