Probably the best advice you will hear in life is this - "Use your judgment".
You have the ability to rationalize.. use it well.
And have confidence in your own self.
Confidence that your judgment too carries solid sense... after you have given enough thought to it.
Confidence that your judgment too is reliable and worth something.
This is something I read recently and it made sense to me -
When in doubt, toss a coin. Not bcoz the tossing coin has any special effect.
But while the coin flips, you desperately hope for one option and thats your solution.
The answer already lies within us.
All you have to do is - use your judgment. :)