Excellent advice from the Detroit Free Press/FTC as it applies to computer security:
*Do not click on any links or attachments in suspicious emails.
*Protect your Social Security number throughout the year.
*Do not file your tax return from a coffee shop or other public area. Use a secure internet connection if you file electronically.
*Research a tax preparer thoroughly before you hand over personal information.
*Check your credit report at least once a year for free at annualcreditreport.com. Make sure no one has opened a new account in your name.
Go to FREEP to read the rest of the article. It includes advice for offline security as well.