If it is absolutely necessary that you check your email and the only way to do it is on a public computer, forward your email to a disposable email account like Mailinotor or Trashmail that has a short life and a timed expiration.
Keep outsiders off your wireless network.
The hit app has had some security issues.
What to do if you receive a notification about a suspicious login to your Facebook or Instagram account.
If you work with sensitive data, these obscure features of PDF, MS Office, and cloud documents are worth knowing.