You need to decide, to choose. The decision itself is not important. Let's concentrate on the process.
How do you make your decisions?
- You look at all the options, find the high and low scores, then choose the highest one.
- You recognize the option that's right for you and decide without looking at further ones.
Your answer is probably both. In some cases, you look at all the options; in others, you immediately know when you encounter the right one.
The second method is faster and more efficient. You do not have a guarantee that you have made the ultimate choice, but you do know it's a right choice.
You should only check all the options and then decide when you are not clear about the best and worst options. Knowledge of what's best and worst for making a particular decision comes from clarity combined with experience.
The more clearly you know your goal and the mechanism that can get you there, the deeper your current knowledge is (based on past experiences), the better you can decide without exhaustively studying all your options.
Since experience is not something you can suddenly change, your best option for efficient decision-making is to be clear about what you can - your idea and your goal.
When you are working on implementing your idea, make sure you see the essence of what your idea is and what it's trying to achieve.
Even without much experience, this can give you the key to quickly and easily make the right decisions without going through all the options.