Google has now enabled the option of Signing in to multiple Google accounts simultaneously from the same browser.This option can be enabled by going to the Google Accounts page and enabling the 'Multiple sign-in' option.
When multiple sign-in is enabled, a drop-down is displayed next to your email address at the top of the page, so you can quickly switch to a new account.
If you use multiple sign-in, the first account you sign in to will be your default account. If you visit other Google products that don’t support multiple accounts after you’ve signed in, you will automatically sign in to your default account for that product. If you sign out of any Google product, you will be signed out of all your Google Accounts at once.
