When shopping online, always use your credit cards instead of a debit card. If any fraud happens, it is far easier to recover your money from a credit card transaction. Gift cards and one-time-use credit card numbers are even more secure.
Two Factor Authentication (2FA) is one of the best steps you can take to secure any account. 2FA is when you require both a password and code sent to or generated by your mobile device. Examples of services that support two-step verification include Gmail, Dropbox and Twitter.
One of the most effective ways you can protect your computer at home is to make sure both the operating system and your applications are patched and updated. Enable automatic updating whenever possible.