Teach kids confident decision making by teaching them to declutter.
Decluttering means making decisions.
"No, you don't get to keep everything. Only the important things"
See discomfort and confusion?
Teach them to navigate those feelings.
Discomfort and confusion are not scary, inability to recover from them is.
Let's be honest, adulthood is full of uncomfortable experiences - disappointments, heartbreak, etc.
But along with disappointments come successes, accomplishments, and growth.
The same way you taught them to get up again and again while learning to walk, now teach them to let go of things again and again. To make decision, to own their choices, to feel confident.
Very soon they'll have to decide what clases to take, what boy or girl to date, what college to go to and whom to marry. Give them the skills to navigate those decisions. Start small, start today.