Multiple AdWords Account Logins are Now Enabled by Google
In order to manage multiple accounts, we would have been having several browsers opened. Now thers an end for it. Google has now announced a new workflow to switch between multiple accounts, without logging out of the current id and logging in to the other account.
To use Adwords, you can select your account by clicking either on the customer Id or the login email (account selector). Adding more accounts can be done using "Add Account " button.