How to create a Google account without using Gmail

Google is providing us large number of services such as youtube,news,adwords etc.So to access all this we have to make Gmail account for all this.So Most of people prefer using outlook or yahoo services.
So user can access all the google services using there existing email id.

So all you have to do is to make Google account using previous email id.
Visit here to create Google  account.

With single username you can access all Google.