If your account is set up with corporate hierarchy and you are at the Parent level, navigation is easy. Select "Change Account" from the drop-down menu in the upper right-hand corner and choose which account you want to go to.
You also have the option of setting a default account. Edit your profile, find the drop-down list of accounts and select the account you would like set as your default. The next time you log in, you will automatically see your default account set in the dashboard.
Take a look at the video below to see how easy it is: