A couple of days ago I watched Gillian Perkins video about decision making. Her method is so simple and efficient.
Let’s say you cannot choose between a black shirt and purple shirt. You ask your mom/partner/ friend about and if they say black, and you feel “Oh no, why did s/he said black, I wanted purple one” you know what you actually want. You want to wear a purple shirt.
If your feeling is more “Oh yes, black is better,” then you know what you want. You can use other people to figure out your wants.
Hope this helps,