What are some of the best tools to protect yourself from getting hacked?

In light of the recent news about the CIA/WikiLeaks fiasco, there's heightened awareness about the threat of hacking. What apps and resources can individuals use to protect themselves as much as possible?
Melissa Joy KongContent, Product Hunt · Asked
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Signal 2.0

Send end-to-end encrypted text, picture, and video messages

Lachlan Campbell4Code, apps, design, high school. · Written
Signal is a Snowden-approved, end-to-end encrypted chat app. It's widely considered the safest messaging service. 💬
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