Most courts have ruled that an employee does not have an expectation of privacy from what they communicate by way of their personal computer at work. Data sent from a company email can be tracked back to you the sender.
A bit more privacy exists at your home computer, but external sources are able to track where you surf by cookies that your computer leaves behind. Where you surf is not a private matter and users should know that.
Going to your local coffee shop to surf does nothing to increase your privacy either. Your laptop just like your personal computer has an IP address that can be tracked back to you. Those emails you send while sipping that morning coffee are traceable to you, too.
As a final caution, change up your passwords frequently. Do not use easily thought of passwords such as your date of birth or name. Mix letters and numbers in the passwords. And vary your password from account to account.