How many times has "Let me think about it" turn into "I forgot about it"? How many opportunities have we missed after hesitating to act right away on a good idea?
Opportunities seldom knock twice and once we miss an opportunity, there's no telling when another opportunity will come our way.
While it is true that we should avoid making hasty decisions, making decisions should never take too long. Do your due diligence but act decisively at the soonest or risk losing out on a golden opportunity.