Mistakes are a part of being human. Appreciate your mistakes for what they are: precious life lessons that can only be learned the hard way. Unless it's a fatal mistake, which, at least, others can learn from.
When you encounter seemingly good advice that contradicts other seemingly good advice, ignore them both.
The biases the media has are much bigger than conservative or liberal. They're about getting ratings, about making money, about doing stories that are easy to cover.