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A few additional thoughts:

It's relatively easy to "sniff" wireless connections and collect passwords and other personal information. Any time that you're connected to a wireless network, assume that someone is listening in.

The person running the wireless access point can collect all of the information from your session. In some countries, this may be sanctioned by the government intelligence agencies.

If you're running Outlook or a similar email program, your password may be sent across the network unencrypted, especially if the POP protocol is being used. I use the IMAP protocol over an encrypted (TLS) connection to protect my password and to make eavesdropping more difficult. (These options are configurable with your email provider.)

If you do any banking, be sure that you're on an encrypted (https) connection. If you get a popup warning you about a certificate error, don't enter your password. You may be connected to a nefarious site instead of your bank.

... professional paranoid (I do this for a living.)
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