It's a fact that decision fatigue can lead to analysis paralysis and overwhelm our daily lives. On the one hand, choices give us freedom and allow us to see the possibilities, especially for the important things in life. The downside is we are constantly bombarded with tiny decisions throughout the day.
Ultimately, there is no way to be sure that the so-called right decision has been made before it has been made and acted on. All you can do is ensure that the process of decision-making is deliberately and painstakingly executed. That doesn't guarantee the best decision, but it sure makes it a lot more likely.