"Making the wrong decision is better than not making any decision or deciding too late"
That's a saying I really go by in life.
Our entire life is made up of decision - whether they are big ones like a career path or a partner and whether they are micro-decisions like what shirt would I wear today, or what would I eat for dinner.
Let me provide you with some examples on each type:
First -Big decisions: Say you want to create a startup, you have two ideas and each solves a different problem, you spend too long trying to figure which one will be the option and eventually there are other patent requests with a similar idea to yours.
Second - Micro decisions: someone on a date who is trying to decide what they should wear spending too long in front of the closet and being so late for their meet so the other person just feels offended and whatever the clothes choice was is totally irrelevant anymore.
Also, there is a psyhcological cost to not deciding - spending too long trying to make a decision will decrease ones self esteem and increase the dissapointment of onself.
Decide - you might be right, you might be wrong, make it calculated but not too long.