Years later you can still find bloggers on both sides of the dofollow or nofollow fence. I am a pro dofollow blogger.
When being a blogger it is important to keep your reputation intact by being choosy about what you promote. Watch my video talking about your reputation.
When blogging about news, current events or even providing information to your readers make sure your information is accurate and cite your sources.
With this link checker tool you can determine if any of your external links might be pointing to malicious sites or sites flagged by Google as spam or worse.